Answer: sagittal plane
Explanation: sagittal plane is one of the body planes,the others are coronal and transverse.
The sagittal plane divides the body into left and right portions.
Dividing the body into plans is important in the study of anatomy as it helps in precision of the part of the body under consideration and it prevents errors.
Medicines are often administered in pill form. In many cases, the active ingredient of the pill (the drug) is joined to another substance by ________. This forms a/an ________, which is stable in the dry environment of a pill bottle but dissociates under the wet conditions of the digestive system to release the drug to the body.
a. covalent bonds; salt
b. ionic bonds; salt
c. ionic bonds; acid
d. hydrogen bonds; base
Answer:
Option B, ionic bonds; salt
Explanation:
All medicines either in the form of pills or liquid interact with our body by forming a bond with target specific receptors. For instance if a pain killer is taken then it shall form bond with receptors produced by pain and inflammation
So medicines are basically chemical which interact with biomolecules such as enzymes, nucleic acid, hormones, ions etc. by forming ionic bond, hydrogen bond, van der wall force etc. in the active site of enzyme.
These salt molecule remain stable in normal conditions but as they come in contact with digestive system of the body (with different pH) they release the drugs
Hence, option B is correct
A woman who is a carrier for hemophilia marries a hemophiliac man. What will be their children’s possible phenotypes?
Answer:
Hemophilia is a sex-linked recessive disorder in which a person's blood do not clots and he can bleed to death even after minor injuries because blood will keep running due to a small cut.
It is a recessive trait which means that even if one normal gene is present along with Hemophiliac gene, the person will not have the disease and he will be the carrier.
Question: What will be their children’s possible phenotypes?
If a woman who is a carrier for hemophilia marries a hemophiliac man, their genotypes can be denotes as :
Here H, indicate normal gene and small h indicate defected (hemophilia) gene.
Parents: XHXh X XhY
Offspring: XHXh : XHY: XhXh: XhY
Phenotype of offspring:
XHXh: The child will be daughter and normal (25 % chances)
XHY: The child will be son and normal (25 % chances)
XhXh: The child will be girl and Hemophiliac (25 % chances)
XhY: The child will be son and Hemophiliac (25 % chances)
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Without elephants, some of the grasslands in Africa would eventually become thickets or forests because elephants weed out trees and shrubs. Even though elephants make up a small percentage of the animals living on the grassland, the grassland would eventually cease to exist without them. In this community, elephants are __________.
Answer:
Without elephants, some of the grasslands in Africa would eventually become thickets or forests because elephants weed out trees and shrubs. Even though elephants make up a small percentage of the animals living on the grassland, the grassland would eventually cease to exist without them. In this community, elephants are keystone species.
Elephants are often called “keystone species” because of their unique role in providing vital services to an ecosystem in relation to their abundance.
Explanation:
Elephants play a very important role in maintaining the biodiversity of the ecosystems in which they live. During the dry season, elephants use their tusks to dig for water. This not only allows the elephants to survive in dry environments and when droughts strike, but also provides water for other animals that share harsh habitats.
Elephants eat some trees and create gaps in the vegetation. These allow new plants to grow and create pathways for other smaller animals to use. They are also agent of seed dispersal of trees and in fact some species of trees rely entirely upon elephants for seed dispersal.
Elephants feed on tree sprouts and shrubs in savannahs. They help keep the plains open and able to support the plains game that inhabit these ecosystems.
Elephants also leave a dung that is full of seeds from the many plants they eat. When this dung is deposited, the seeds are sown and grow into new grasses, bushes and trees, thereby boosting the proliferation organisms in the savannah ecosystem.
Final answer:
Without elephants, African grasslands would likely transition into thickets or forests, signifying their role as keystone species that manage the vegetation. Elephants engage in ecosystem engineering through weeding out trees and shrubs, dispersing seeds, and facilitating species diversity.
Explanation:
Without elephants, some of the grasslands in Africa would eventually become thickets or forests. This is due to the ecosystem engineering role of elephants, who help maintain the grassland habitat by weeding out trees and shrubs as they feed on them, disperse seeds, and create disturbances that prevent tree regeneration. Elephants are therefore crucial keystone species in these ecosystems, shaping vegetation structure and composition, influencing biodiversity, and affecting the survival of other species.
Elephants are not only important for maintaining grassland ecosystems but they also facilitate species diversity and ecosystem processes. Their dung provides a significant source of food for dung beetles and serves as a germination site for seeds. However, it's important to balance their numbers, as overpopulation can lead to habitat destruction and the decline of other species upon which they depend. This delicate balance emphasizes the complex role elephants play in their habitats and the conservation challenges faced in managing their populations.
a_____that tells you how you will be graded on an assignment or assessment is called a_____
A grading rubric is a tool that outlines the criteria and expectations for an assignment or assessment, providing guidance on how it will be graded. It is used in various subjects and grade levels.
Explanation:The term that describes how you will be graded on an assignment or assessment is called a grading rubric. A grading rubric is a tool that outlines the criteria and expectations for the assignment, and it often includes a scoring scale or specific guidelines for each level of achievement. For example, in a math class, a grading rubric might specify that correct calculations are worth a certain number of points, while showing work and providing explanations are worth additional points.
Grading rubrics are used in various subjects and at different grade levels, including Mathematics, History, English, Biology, Chemistry, Physics, Social Studies, Advanced Placement (AP), SAT, Geography, Health, Arts, Business, Computers and Technology, French, German, Spanish, World Languages, Medicine, Law, and Engineering.
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Over time, humans have become increasingly dependent on which of the following in order to cope with the range of environments they have occupied in time and space?
Answer:
there are various factors on which humans have depended over the years .they are discussed below:-
Explanation:
in order to cope with the range of environments over the years ,humans have become increasingly dependent on a wide variety of food so that they can adapt to their environment .for example in winters people mostly use dry fruits and in summers the eating and drinking habits totally change.besides that , the clothing stuff had also contributed to changing environment.
Most importantly , the use of technology have increased a lot .humans have become dependent to a lot usage of technology over the years, in order to cope up with the environment.
Which situation would inhibit a Krebs cycle from functioning in an organism’s cells?
Answer:
If the formation of Acetyl CoA does not occur.
Explanation:
A Krebs cycle which is also known as the citric acid cycle, is a cycle showing parts or series of chemical reactions to generate energy by aerobic organisms.
The acetyl coA is converted to two carbon molecule, that is, oxaloacetate, which enters the Krebs cycle.
The broadest way to classify the nervous system is to differentiate between the ______ nervous systems.
Answer:
Central and Peripheral
Explanation:
The nervous system is divided into two parts: the central nervous system and the peripheral nervous system. The central nervous system includes the brain and spinal cord.
On the other hand the peripheral nervous system includes all of the nerves that branch out from the brain and spinal cord and extend to other parts of the body including muscles and organs. Each part of the system plays a vital role in how information is communicated throughout the body.
The below diagram provides a schematic view of the role of each sub-division of the Nervous System.
Three different alleles (c1, c2, and c3) at the c locus exist in a hypothetical population of juniper trees. If the frequency of c1 is 0.3, the frequency of c2
a) cannot be less than 0.3.
b) cannot be greater than 0.3.
c) is 0.7.
d) cannot be greater than 0.7.
Answer:
d
Explanation:
When considering the frequency of the potential alleles of a gene in a population, the total must add up to 1. Think of it like percentages. an allele frequency of 0.3 means 30% of the population carry it (out of a possible 100%).
We know that the frequency of c1 is 0.3. Lets take each option and see if it can be true
a) cannot be less than 0.3. - false. It could be less than 0.3. For example, it could be 0.1, meaning the frequency of allele c3 would be 0.6 (because 0.3 + 0.1 + 0.6 = 1)
b) cannot be greater than 0.3. - false. It could be greater than 0.3. For example, it could be 0.5, meaning the frequency of allele c3 would have to be 0.2 (because 0.3 + 0.5 + 0.2 = 1)
c) is 0.7. - false. It can't be 0.7, because that would mean that the frequency of c3 is 0. (0.7 + 0.3 = 1)
d) cannot be greater than 0.7. - true. It cannot be greater than 0.7, because that would mean that the frequency of c3 is 0. (0.7 + 0.3 = 1)
Given the allele frequencies in a population should add up to 1, if the frequency of allele c1 is 0.3, the frequencies of c2 could, theoretically, range from 0 to 0.7. Hence, the frequency of c2 cannot be greater than 0.7.
Explanation:The question relates to frequencies of alleles in a population of juniper trees. There are three possible alleles, denoted c1, c2, and c3 and we are given that the frequency of c1 is 0.3. Considering the principle of population genetics, the total of allele frequencies in a population should add up to 1. In this case where there are three alleles (c1, c2, and c3), if the frequency of c1 is 0.3, then the combined frequencies of c2 and c3 would be 0.7 (1 - 0.3).
Therefore, the frequency of c2 could be any value from 0 to 0.7. The only suitable answer provided is option d) cannot be greater than 0.7.
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In the case of a specific ____________, the anxiety produced by the given stimulus or situation is typically disproportionate to the actual threat the stimulus or situation poses.
Answer:
phobia
Explanation:
Phobia defined as irrational fear against something. The fear will cause anxiety feeling that make the threat feels much bigger than it should be. (For example, some people have a phobia of insects, and will scream uncontrollable and sobbing every time they see one of them)
A person will determine a situation as dangerous or threatening based on their past experience. This will vary greatly, which make phobia can come from any condition. Many phobias not comes from a dangerous or life-threatening condition but acquired from a really unpleasant memory.
Which of the following is not an example of exponential growth?
A. rabbit populations after being introduced to Australia
B. reindeer of the Pribilof Islands after eating most of the lichens
C. a bank account that earns interest
D .mold appearing on bread overnight
Answer:
B. reindeer of the Pribilof Islands after eating most of the lichens
Explanation:
Exponential growth refers to the specific way that a quantity may increase over time. It occurs when the instantaneous rate of change of a quantity with respect to time is proportional to the quantity itself.
From the above options:
B. reindeer of the Pribilof Islands after eating most of the lichens is the correct answer because if we ake a look at the other options;
a rabbit populations after being introduced to Australia may have undergone some behavioral modifications that makes it to change drastically over the course of time.
a bank account that earns interest increases with time.
mold appearing on bread overnight is as a result of bacteria formation and it also increase with time.
Answer:
B
Explanation:
Asexual reproduction during which a bacterium clones itself and splits into two genetically identical organisms is called ________.
Answer:binary fission
Explanation: bacteria are Unicellular prokaryotic organisms.
Reproduction involves one parent and so they do not produce gametes.
Since they do not have nucleus,they do not undergo mitosis .
They possess a long DNA strand which replicates itself. the cell membrane then divides to form two new daughter cells which are genetically identical to their parents.
Use the phylogenetic tree to the right to determine which statement below is true.
Organisms A and F are not related.
Organism E is more closely related to organism B than organism F.
Organisms C and D are more closely related than organisms A and B.
Answer:
Organisms C and D are more closely related than
Organisms A and B
Explanation:
Organisms A and B are not related much as the distance between them is more than the organisms C and D so the C and D are closer than A and B. The phylogenetic tree shows the biological evolutionary relationship among various biological species. So the given tree shows the relationship as mentioned above.
It also show the physical and genetic relationship among the various biological species. The phylogeny is generally shown by using a particular phylogenetic tree. For example, the simple one below which describes the different evolutionary relationships between the great apes. The genus Pongo includes orangutans, Pan includes chimpanzees and bonobos, and Homo includes humans, while Gorilla is self-evident.
Organism relationships are based on a phylogenetic tree which shows "organisms C and D are more closely related than organisms A and B" as the true statement.
Explanation:The phylogenetic tree visually represents the evolutionary relationships among different biological species, supporting the described relationships. Organisms A and B are distantly related, indicated by their greater evolutionary distance compared to organisms C and D, which suggests that C and D are more closely related than A and B. This tree also conveys both the physical and genetic connections among these species. Phylogeny is typically depicted using specific phylogenetic trees, such as the simplified one below, illustrating the diverse evolutionary relationships among great apes. In this context, the genus Pongo encompasses orangutans, Pan includes chimpanzees and bonobos, Homo encompasses humans, and Gorilla represents gorillas.
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The endocrine system incorporates feedback mechanisms that maintain homeostasis. Which of the following demonstrates negative feedback by the endocrine system?A) During labor, the fetus exerts pressure on the uterine wall, inducing the production of oxytocin, which stimulates uterine wall contraction. The contractions cause the fetus to further push on the wall, increasing the production of oxytocin.B) After a meal, blood glucose levels become elevated, stimulating beta cells of the pancreas to release insulin into the blood. Excess glucose is then converted to glycogen in the liver, reducing blood glucose levels.C) At high elevation, atmospheric oxygen is scarcer. In response to signals that oxygen is low, the brain decreases an individual’s rate of respiration to compensate for the difference.D) A transcription factor binds to the regulating region of a gene, blocking the binding of another transcription factor required for expression.
Answer:.B) After a meal, blood glucose levels become elevated, stimulating beta cells of the pancreas to release insulin into the blood. Excess glucose is then converted to glycogen in the liver, reducing blood glucose levels
Explanation:
Homeostasis is the ability to keep the conditions of it's internal environment constant, regardless of the external environment.it does this either by increasing the effect of a recieves stimuli (positive)or reducing the effect of the stimuli (negative). negative feedback mechanism is used by the body to restore it back to it's normal conditions.majority of homeostatic mechanisms are negative feedback.
For example the regulation of blood glucose levels which is regulated by the hormones,insulin and glycogen to keep it constant.
The failure of this homeostasis process would lead to diabetes
The answer option which demonstrates negative feedback by the endocrine system is: B. After a meal, blood glucose levels become elevated, stimulating beta cells of the pancreas to release insulin into the blood. Excess glucose is then converted to glycogen in the liver, reducing blood glucose levels.
An endocrine system can be defined as series of ductless glands and organs that are responsible for the production and secretion (release) of hormones that are used in the body of a living organism, for the performance of various functions such as:
MetabolismControlling growthReproductionMoodSleepDigestionGenerally, the hormones are secreted (released) directly into the circulatory system (blood) and then transported to the organs and tissues in the body. Thus, the endocrine system contributes significantly to the state of homeostasis in the body.
During homeostasis, a negative feedback-loop inhibits (decreases or reduces) the response by the body system.
In this scenario, a negative feedback is demonstrated by the endocrine system when beta cells of the pancreas release insulin into the blood, so as to reduce blood glucose levels after a meal.
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The nursing instructor is teaching the students about anesthesia and informs them that there are two types. What are those two types of anesthesia? (Select both that apply.)A. Local anesthesiaB. Topical anesthesiaC. General anesthesiaD. Regional anesthesiaE. Spinal anesthesia
Answer:
The answer is C and D.
Explanation:
Although there are more than two types of anesthesia, 3 to be exact, which are local, general and regional, the two types of main anesthesia are;
1 - General Anesthesia which renders the subject unconscious for an operation or treatment.
2 - Regional Anesthesia which blocks the registration of pain for a certain body part so that the patient does not experience the pain during the procedure.
I hope this answer helps.
Certain traits will have been lost from the gene pool forever. some may be obvious, like people with red hair or double jointed thumbs. others will be less obvious, like the ability to process cholesterol or being allergic to peanuts.
This loss of diversity in a reduced population is called ________.
A. gene flow
B. bottleneck effect
C. genetic drift
D. founder effect
Final answer:
The reduction in genetic diversity in a population due to a significant loss of individuals is known as the bottleneck effect, which is an example of genetic drift and differs from the founder effect. So the correct option is B.
Explanation:
The loss of diversity in a reduced population you're describing is called the bottleneck effect. This effect occurs when there's a significant reduction in population size due to a random event, such as a natural disaster, which results in a large portion of the gene pool being wiped out. In one instance, the surviving population's genetic structure becomes representative of the entire population, leading to reduced genetic variation.
Both the bottleneck effect and the founder effect are specific examples of genetic drift. However, they are not the same. While the bottleneck effect is often due to a drastic and sudden decrease in population size, the founder effect occurs when a new population is established by a small number of individuals from a larger population, potentially carrying an unrepresentative set of alleles.
Which statement describes a situation where the process of cellular respiration is not working properly in a cell?
Answer:
Option D, A Golgi apparatus is unable to package a protein due to lack of ATP
Explanation:
Please see the attachment
This is the largest digestive organ. One of its functions is to receive matter from the portal vein.
Which organ is it?
A. small intestine
B. liver
C. pancreas
D. gallbladder
Answer:
the correct option is B.
Explanation:
the liver is the second largest digestive organ in our body which receives portal vein. 1st is skin but it does not receive the portal vein.
liver performs many important and vital processes that are necessary for the body to function normally. for example . it performs detoxification, helps in bile production, stores the nutrients and most importantly as mentioned above it receives portal vein .
so, the correct option is B.
Movement of fluids and solutes out of capillaries into the interstitial fluid occurs by filtration, which is driven by capillary blood pressure and opposed by
Answer:
The correct answer will be- interstitial fluid hydrostatic pressure
Explanation:
The exchange of fluid between the tissues and the capillaries is determined by the hydrostatic pressure which refers to the pressure exerted by any fluid in an enclosed space.
The pressure exerted by the blood on the walls of the capillary vessels is known as the capillary hydrostatic pressure which is responsible for the exchange of the fluid between tissues and the capillaries.
During the exchange of the fluid from the capillaries to the issues the hydrostatic pressure of the interstitial fluid rises which is known as the interstitial fluid hydrostatic pressure. This pressure opposes the fluid exchange so the capillary hydrostatic pressure is usually found higher than the interstitial fluid hydrostatic pressure.
Thus, interstitial fluid hydrostatic pressure is the correct answer.
Filtration, the process of movement of fluids and solutes from capillaries to interstitial fluid, is driven by hydrostatic pressure and opposed by osmotic pressure. Hydrostatic pressure forces out fluids, whereas osmotic pressure counters this by drawing fluids back into the capillaries.
Explanation:The movement of fluids and solutes out of capillaries into the interstitial fluid, known as filtration, is primarily regulated by two forces: hydrostatic pressure and osmotic pressure. Hydrostatic pressure, also known as capillary blood pressure, is exerted by blood against the walls of blood vessels due to the pumping action of the heart. It forces plasma and nutrients out of the capillaries and into surrounding tissues. However, this process is counteracted by osmotic pressure, which is primarily produced by circulating albumin. Osmotic pressure draws fluid back into the capillaries, and is influenced by solute concentration gradients. The balance between these two pressures drives the process of fluid movement between compartments.
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The change in genetic composition of a population due to sampling (a random event) best describes:
Answer:Genetic drift
Explanation:
This is the change in genetic composition due to the random sampling of the genes in the population
Which of the following characterizes the lag phase of the bacterial growth curve?
Answer:
Little increase in cell number
Explanation:
There are four distinct phases in the bacterial growth curves that is lag, log, stationary and death phase. The lag phase of the bacterial growth curve is characterized by very little increase in the cell number.
The growth rate of bacteria in the lag phase is slow because the medium is new to the bacterial culture and it requires time for bacteria have to adapt to the new cultural environment and to synthesize enzymes required for substrate utilization.
After getting adapt in their new environment bacteria starts to grow at an exponential rate. So little increase in cell number characterizes the lag phase.
How can you determine the most effective antibiotic to treat a pathogenic bacterial infection?
Answer:How you can determine the most effective antibiotic to treat a pathogenic bacterial infection is the use of antibiotic sensitivity test.
Explanation: sensitivity analysis is a test that determines the “sensitivity” of bacteria to an antibiotic. It also determines the ability of the drug to kill the bacteria. The results from the test can help your doctor determine which drugs are likely to be most effective in treating the bacterial infection.
In binomial nomenclature, the genus functions as a(n) , and the species functions as a(n) .
In binomial nomenclature, the genus represents a broader categorization of related species, and the species denotes the specific type of organism within that category, like in Homo Sapiens, where Homo is the genus, and Sapiens is the species.
Explanation:In the binomial nomenclature, which is a scientific system of naming species, the genus functions as a broader categorization and the species functions as a specific designation within that category.
For example, in the name of the species Homo Sapiens, Homo refers to the genus, which encompasses all types of human species that exist or have existed, and Sapiens is the specific species that represents modern-day humans. The genus (Homo) indicates the related group of species, while the species (Sapiens) denotes a specific organism within that group.
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Write the letter all of the following statements that are NOT true. a. Coding sequences for gene products can be isolated from cDNA libraries. b. Antibodies are used for Northern blot analysis. c. VNTRs are highly conserved in human populations. d. PCR amplification generates large numbers of linear DNA fragments. e. RNA molecules can be used as hybridization probes in Southern blot analysis.
Antibodies are used for Northern blot analysis and VNTRs are highly conserved in human populations are the following statements that are NOT true.
b. Antibodies are used for Northern blot analysis.
c. VNTRs are highly conserved in human populations.
Explanation:
The antibodies cannot be used for Northern blot analysis. The northern blot analysis detects the RNA molecules precisely among the group of RNA.
The sample of RNA is taken from specific cell type or tissue and is analyzed to measure the RNA expression of particular genes.
A variable number tandem repeat (VNTR) is found on many chromosomes, and it varies in length from each and every person.
Which of the following spiders can cause a characteristic wound with a bite that is often painless?
A.
Brown recluse spider
B.
Black widow spider
C.
Argiope spider
D.
Sheet web spider
Answer: A. Brown recluse spider
Explanation:
The brown recluse spiders are 0.5 inches long. These are dark violin shaped wound found on the head and midsection. The bite caused by these spiders includes symptoms like reddened skin, blister, pain and itching. The effect of bite remains for 2 to 8 hours. Usually an open sore ulcer develops due to the breakdown of the tissue or necrosis.
If Japanese workers are more productive than French workers, then trade between Japan and France
A) can take place only if France has an absolute advantage in producing a good or service Japanese buyers want.
B) cannot take place because Japanese goods and services will be less expensive than French goods and services.
C) cannot take place until French workers become more productive.
D) will take place so long as each country has a comparative advantage in a good or service that buyers in the other country want.
Answer:
Option D, will take place so long as each country has a comparative advantage in a good or service that buyers in the other country want.
Explanation:
Trading or globalization is a concept where services or goods of one nation can be exported to other nation in terms of some monetary benefits of technological advancement. Two nations will be into a trading partnership till the service or goods of the two nations provide a comparative advantage over and above trading with any other nation. Thus, France shall be taking benefits of better productivity of its workers for meeting out the demand of its citizens in lieu to provide open market for business opportunities in other sectors as well to japan.
Hence, option D is correct
Trade between Japan and France can take place as long as each country has a comparative advantage in a good or service that the other country wants.
Explanation:In this scenario, the correct answer is D) trade between Japan and France will take place so long as each country has a comparative advantage in a good or service that buyers in the other country want.
Comparative advantage refers to the ability of a country to produce a good or service at a lower opportunity cost than another country. If Japanese workers are more productive than French workers, Japan would have a comparative advantage in producing certain goods or services. Similarly, if French workers are more productive than Japanese workers in other areas, France would have a comparative advantage in those goods or services.
Therefore, trade between Japan and France can occur if each country specializes in producing the goods or services in which they have a comparative advantage, and then they can trade with each other to obtain the goods or services that they do not produce efficiently.
Which of the following correctly lists the levels of compaction in eukaryotes from naked DNA to the most compact?
a. solenoid, nucleosome, looped chromatin (300-nm fiber), metaphase chromosome
b. solenoid, metaphase chromosome, nucleosome, looped chromatin (300-nm fiber)
c. metaphase chromosome, nucleosome, solenoid, looped chromatin (300-nm fiber)
d. nucleosome, solenoid, looped chromatin (300-nm fiber), metaphase chromosome
e. nucleosome, looped chromatin (300-nm fiber), metaphase chromosome, solenoid
Answer:
The level of compaction in Eukaryotes from naked DNA to the most compact is:
d. nucleosome, solenoid, looped chromatin (300-nm fiber), metaphase chromosome
Explanation:
As we know that the
Diameter of DNA is 2 nm.Diameter of nucleosome is 11 nm.Diameter of solenoid is 30 nm.Diameter of looped chromation is 300 nmDiameter of meta-phase chromosome is 1400 nmAll of these facts depict that the the least compact is DNA and most compact is meta-phase chromosome.
Which of the following animal-derived foods contains a significant amount of carbohydrates?
a. eggs
b. beef
c. milk
d. poultry
Carbohydrates are one of the nutrients of food that are required to produce energy in the body. They are classified as Starches and Sugars(Saccharides).
Lactose is a disaccharide. This means it is made up of two monosaccharides called galactose and glucose. It is also referred to as milk sugar and it is one of the sugars classified as a carbohydrate.
Therefore, Option c is the correct option
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Dna is a double-stranded molecule made up of complementary _______
Answer: bases
Explanation:
A species of small lizard has three color forms, pale gray, brown, and black. In its original range, the colors of the rocky environment were mixed from pale gray to very dark, and the population had an even mix of all three color forms. The blending of colors with their environment helps the lizards hide from predators. A group of these lizards ended up on an island with all gray rocks. Eventually, only gray lizards remained. This is an example of
Answer:
Directional Selection
Explanation:
In population genetics, directional selection also know as positive selection is a mode of natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype
Some early methods of contraception include which of the following? a. Lemons b. Papaya seeds c. Cotton d. All of these
Answer:
D. All of these
Explanation:
Women in the past used sponges soaked in lemon juice to prevent pregnancy. The citric acid in lemons acts as a natural spermicide. The lemon rind itself (with pulp and juice removed) could be used as a cervical cap. Unripe papaya was used to prevent or terminate pregnancy. ... The seeds of the papaya could actually serve as an effective male contraceptive. Papaya seeds, taken daily, could cut a man's sperm count to zero and was safe for long-term use. The cotton could be seen as a tampon, but was also quite effective as a method of birth control.