Answer:
remove excess waste
Explanation:
The function of the excretory system is to control homeostasis and remove excess waste.
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Many plants respond to changes in day length because of __________________. translocation a pigment that is sensitive to the amount of darkness a specialized stoma that responds to changes in light and darkness an electronic sensor in their leaves
Answer:
a specialized stoma that responds to changes in light
Explanation:
This is the only one that makes sense because an electronic sensor is totally wrong, and translocation definition is the movement of something from one place to another.
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Elephants in the savanna regions of Africa dig holes in dried up river beds to reach water lying just below the surface. These holes provide drinking water for other animals as well. So, without the elephants, many animals might otherwise die from lack of water during the dry season. The location in which the elephants live is an example of a/n ___________, and the role they play in creating water holes is an example of a ____________.
A) ecosystem; habitat
B) community; niche
C) habitat; niche
D) niche; habitat
The theories on the expansion of galaxies
Maybe Re-examined To Strengthen Science
Should Not Be Tested To Strengthen Science
Will Weaken Scientific Knowledge If They Change
Will Become Laws If They Don't Change
Answer:
May be Re-examined To Strengthen Science
Explanation:
Science is always strengthened when theories are re-examined.
Answer:
The correct answer is:
Maybe Re-examined To Strengthen Science.
Explanation:
Hello!
Let's solve this!
The theories on the expansion of galaxies
The correct answer is:
Maybe Re-examined To Strengthen Science.
Theories can be reevaluated to strengthen or invalidate. In this case we will choose to reinforce science. While it is a theory that so far cannot be proven.
Which of the following lists the correct requirements for a black hole to form? A. The star must be 10 to 28 times larger than Earth's sun, and a supernova explosion must have occurred. B. The star must be 29 times larger than Earth's sun, and a supernova explosion must not have occurred. C. The star must be 29 times larger than Earth's sun, and a supernova explosion must have occurred. D. The star must be 10 to 28 times larger than Earth's sun, and a supernova explosion must not have occurred.
Answer:
The star must be 10 to 28 times larger than Earth’s sun, and a supernova explosion must have occurred
Explanation:
Final answer:
The proper conditions for a black hole to form include a star being at least 29 times the size of the Sun and experiencing a supernova explosion, as indicated by option C.
Explanation:
The correct requirements for a black hole to form are found in answer choice C: The star must be 29 times larger than Earth's sun, and a supernova explosion must have occurred. This is because for a black hole to form, the star needs to have sufficient mass to undergo a gravitational collapse beyond the neutron star stage, leading to a point where its gravitational pull is so strong that not even light can escape. The collapse typically follows a supernova, an explosive shedding of the star's outer layers, leaving behind a dense core that under the right conditions, becomes a black hole.
which material is commonly used as a culture medium for living cells
Final answer:
Serum, particularly fetal calf serum, and agar are commonly used culture media in living cell experiments. Artificial media like Eagle's MEM and Tryptic Soy are also employed for specific cell cultivation needs.
Explanation:
The material commonly used as a culture medium for living cells is serum, with fetal calf serum being the preferred choice for animal cell culture. Serum provides an extensive range of nutrients and substances essential for cell growth, such as proteins, glucose, vitamins, and minerals. Aside from serum, other artificial culture media available include Eagle's MEM, Dulbecco's DME, Ham's F-12, and others, which contain a balance of salts and nutrients tailored for cell cultivation.
In bacteriological studies, agar is often used as a solidifying agent to create a supportive surface for the growth of bacteria. For routine bacterial culture, Tryptic Soy (TS) serves as a recommended nonselective growth medium. These components are vital in providing the appropriate physical and chemical environment for the survival and proliferation of cells in vitro.
Why are microorganisms like fungi, bacteria, and archaeons so important to the carbon cycle? These microorganisms form their own portion of the carbon cycle in case other areas of the carbon cycle fail. These microorganisms generate the oxygen necessary for aerobic organisms. Many of these microorganisms generate carbon dioxide, making it available for primary producers. These microorganisms bridge the carbon cycle between terrestrial and marine environments.
Microorganisms like fungi, bacteria, and archaeons are crucial to the carbon cycle. They contribute to decomposition, releasing carbon dioxide for photosynthetic organisms, and also play a role in creating methane.
Explanation:Microorganisms like fungi, bacteria, and archaeons play a vital role in the carbon cycle, which is central to life on Earth. Their functions are varied and extensive. For example, these microorganisms participate in the decomposition of dead organisms and waste materials, returning carbon to the atmosphere as carbon dioxide.
This carbon dioxide is then available for photosynthetic organisms, serving as primary producers in ecosystems. Additionally, in the case of certain anaerobic bacteria and archaeons, they can participate in methanogenesis, converting carbon compounds into methane, an important greenhouse gas.
These microorganisms essentially act as bridges in the carbon cycle, connecting the marine and terrestrial aspects, and also ensuring the continuation of the cycle even if certain other components fail. They do not directly generate oxygen, but their role in the carbon cycle indirectly influences the levels of atmospheric oxygen.
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What substance in the leaves gives them a green Colour?
PLEASE HELP
The two parts of tRNA molecule that function in protein synthesis are ____.
a. an anticodon and an amino acid
b. its shape and size
c. its base pair sequence and its loops
d. a start codon and a stop codon
Answer: a. an anticodon and an amino acid
Explanation:
The following is a typical structure The tRNA where we can observe an anticodon that binds to the nucleotide sequence of the mRNA and an amino acid that in triplet encodes for an protein.
which organisms are most closely related?
A. Buteo lineatus and Buteo platypterus
B. Elanus leucurus and Pandion haliaetus
C. Carpodacus mexicanus and icterus galbula
D. Cyanocitta stelleri and Polysticta stelleri
The organisms Buteo lineatus and Buteo platypterus are most closely related. Thus, the correct option is A.
How evolutionary relationships are determined among the organisms?Evolutionary relationships among the organisms of the same or different species are determined with the help of a phylogenetic tree. It initiates with an ancestral group and evolves with time.
Buteo lineatus and Buteo platypterus are two distinguishable kinds of hawks. Buteo lineatus is a red-shouldered hawk while Buteo platypterus is a broad-winged hawk. Both the organisms are native to North America.
Therefore, the correct option for this question is A.
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A sign of global warming and general climate change would be?
Answer:
It is B the one your already on
Explanation:
The amount of radioactive isotopes contributing heat to Earth is greater now than it was when Earth was newly formed.
Question 20 options:
True
False
Answer:
false
Explanation:
The amount of radioactive isotopes contributing heat to Earth is less now than when Earth was newly formed because these isotopes have decayed over time, making the statement false.
The statement that the amount of radioactive isotopes contributing heat to Earth is greater now than it was when Earth was newly formed is false. Radioactive isotopes such as 238U, 235U, 40K, and 232Th have been providing heat to Earth's interior through radioactive decay. Initially, there were more of these isotopes when Earth was young, making the radioactive contributions and resulting heat greater. These isotopes decay over time, reducing their quantity and the heat they produce. Presently, the heat produced by radioactive decay is roughly 25% of what it was at Earth's formation.
Additionally, Earth's heat also comes from the initial deposit of heat left over from its formation and accretion, with energy contributions from impacts such as the one from Theia, which led to the creation of the Moon. However, it's the radioactive decay of primordial elements that still significantly contributes to Earth's internal heat, albeit less so than when Earth first formed.
Infants and young toddlers find it more difficult to recover from brain damage than adults because their brain has not developed plasticity yet.
Answer:
False
Explanation:
If it is a T or F questions then yes it is false.
Contrary to the misconception, infants and young children have a high capacity for brain recovery due to neural plasticity, which allows the brain to form new neural connections.
Neural plasticity refers to the brain's ability to reorganize itself by forming new neural connections throughout life. For instance, when an infant suffers damage to the temporal lobe's facial recognition areas, although they may face challenges, the brain's ability to adapt is still significant.
Neuroplasticity continues into adulthood, although its effects may be less pronounced compared to those in children. Adult brains can still rewire to compensate for injury and change in response to experiences, which is evident in cases such as accomplished musicians displaying larger auditory cortexes or requiring less neural activity for finger movements. Despite these adaptive capabilities, some conditions like neurodegenerative diseases do pose much greater challenges and may not show strong evidence of the brain's capacity to recover.
Photosynthesis occurs in both prokaryotes and eukaryotes.How do the location where photosynthesis occurs differ in prokaryotes and eukaryotes?
Answer:
In eukaryotes, it occurs in the chloroplast. In prokaryotes it does it in the cytoplasm.
Explanation:
Prokaryotes don't have organelles such as the mitochondria and the chloroplast, it just has cell membrane, which its only function is to protect the cell and is unable to generate chemical processes; the DNA, which stores and manages only the genes, which would be affected if exposed to a chemical process like photosynthesis; and the cytoplasm, which stores the materials that the cell needs, where photosynthesis occurs. Eukaryotes have chloroplasts, which absorb the sunlight and combine it with carbon dioxide and water to realize photosynthesis.
Answer:
C
Explanation:
it right on edmentum
_____ currents are caused by temperature and density differences
Answer:
Deep water currents are caused by temperature and density differences
Answer:
Deep water currents.
Explanation:
Deep water currents are formed, when the water become more dense, surface water is cool. and movement of water below the surface. Currents are caused by differences in density, temperature and salinity.
Deep water currents is arise in several ways:
The water along the surface to form wind currents, and deep oceanic currents are caused by differences in temperature and salinity.
They carry cold water from poles to the equator slowly than the surface water currents. Deep currents are prevalent in the oceans.
Which of these phrases best summarizes the mission of the Convention on Biological Diversity?
Answer:
sustainal development
Explanation:
Answer:
sustainable development
Explanation:
for ap!xs
What characteristic of radioactive decay makes it useful for determining the absolute age of samples?
Question 10 options:
occurs at a constant rate
changes based on temperature
speeds up under high pressure
slows down in very dense samples
Answer:
occurs at a constant rate
Answer:
Option A, occurs at a constant rate
Explanation:
It becomes easy to determine the age of any radioactive substance when the rate of decay is constant and its starting and presents mass is known.
For example - if we know that the mass of a radioactive substance is 100 Kg few years back , but its present mass is 10 Kg. Then if we know the value of rate of decay, we can easily determine the age of substance based on the logarithmic equation as given below
[tex]A_t= A_0*e^{kt}[/tex]
Where [tex]A_t[/tex] is the mass of radioactive substance at time t
[tex]A_0[/tex] is the mass of radioactive substance at time [tex]t=0[/tex]
t is the time in years and
k is the decay constant.
Hence, option A is correct.
How often does the total volume of blood circulate through the system?
Answer:
obese kids per happy meal
Explanation: ok/hm
Which of the following allele pairs demonstrate a heterozygous dominant trait?
A.aa
B.AA
C.Aa
D.AB
C. Aa demonstrates a heterozygous dominant trait.
What is a heterozygous dominant trait?A heterozygous dominant trait is a genetic trait that is determined by the presence of two different alleles, one dominant and one recessive, in an individual's genotype. The dominant allele will express its effect, determining the phenotype (observable traits) of the individual, while the recessive allele has no visible effect.
For example, if the dominant allele for a certain trait codes for the production of a functional protein and the recessive allele codes for a non-functional protein, the heterozygous individual will express the functional protein and display the dominant trait.
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Why is active transport necessary for the sodium-potassium pump to work?
A. All channel movement requires active transport to equalize the cell
B. It allows sodium and potassium to move against their concentration gradient
C. The potassium would never leave a cell while sodium can move against the gradient
D. The sodium would never leave a cell while potassium can move against the gradient
Answer:
A. All channel movement requires active transport to equalize the cell
Explanation:
Active transport is necessary for the sodium-potassium pump to work because all channel movement requires active transport to equalize the cell.
Answer:
B. It allows sodium and potassium to move against their concentration gradient
Explanation:
The role of sodium and potassium pump in the body is to help move ions against their concentration gradient. There are two types of transport (1) active transport (2) passive transport.
Passive transport is a natural phenomenon in which ions move from high concentration to lower concentration. In such transport no ATP/energy is required. In contrast to this, active transport is a kind of transport which occurs against concentration gradient and in order to facilitate this opposite movement of ions they require ATP/energy input. Sodium and potassium pumps perform active transport in our body. In neurons they play an important role of ion exchange. They move sodium and potassium ions against their concentration gradient for which they require ATP and thus help in basic functioning of neurons.
_____ are surface appendages that allow a bacterium to stick to a surface.1. Ribosomes2. Mitochondria3. Fimbriae4. Flagella5. Cell walls
Fimbriae are surface appendages that allow a bacterium to stick to a surface.
What is fimbriae?Fimbriae are defined as the long filamentous polymeric protein structures located at the surface of bacterial cells. They enable the bacteria to bind to specific receptor structures and thereby colonize specific surfaces.A bordering fringe especially at the entrance of the fallopian tubes. A join of nerve fibers bordering the hippocampus and joining the fornix.The fimbriae are a smaller version of pili. They are short appendages-like structures present on the surface of the cell wall of many gram-negative bacteria.To learn more about fimbriae refer to:
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Which of the following are indications for using parenteral nutrition? Select all that apply.
a. Paralytic ileus
b. Severe short bowel syndrome
c. Dysphagia
d. Coma
e. Good peripheral veins
f. Need for more kilocalories and nutrients
Answer:
tippy for my bung hole
Explanation:
tpppp my bung hole
Patients who are unable to maintain a sufficient oral intake of food or nourishment to meet their metabolic needs should have enteral tube feeding. Enteral feeding is frequently used by medical professionals with individuals who have dysphagia. Thus option A, B,C,F is correct.
What indications for using parenteral nutrition?Patients may require PN for a wide range of illnesses or conditions that affect nutrient digestion, absorption, or food intake.
Short bowel syndrome, GI fistulas, intestinal obstruction, critically ill patients, and severe acute pancreatitis are a few diseases and circumstances where PN is recommended.
Candidates for PN include critically ill individuals who cannot get enteral nourishment and whose nothing-by-mouth condition will persist longer than 4 to 5 days.
Therefore, Paralytic ileus, Severe short bowel syndrome, Dysphagia, Need for more kilocalories and nutrients are indications for using parenteral nutrition.
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I need some help everybody.
The production of cells during mitosis into specialized function is called: recombination or differentiation
Answer:
recombination
Explanation:
Recombination occurs when two molecules of DNA exchange pieces of their genetic material with each other. One of the most notable examples of recombination takes place during meiosis (specifically, during prophase I), when homologous chromosomes line up in pairs and swap segments of DNA.
Under the Soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. Please select the best answer from the choices provided A B C D
Answer:
A controlled all forms of communication
Explanation:
Cells control gene expression at which steps
Answer:
Any step of gene expression may be modulated, from the DNA-RNA transcription step to post-translational modification of a protein.
The two main types of fermentation are called
a. alcoholic and aerobic.
b. alcoholic and lactic acid.
c. lactic acid and anaerobic.
d. aerobic and anaerobic.
Answer:
B; alcoholic and lactic acid
Explanation:
The two main types of fermentation are alcoholic and lactic acid. Fermentation is anaerobic as it occurs without oxygen. The common substrate for both fermentation and aerobic respiration is glucose.
Explanation:The two main types of fermentation are:
Alcoholic fermentationLactic acid fermentationFermentation is a metabolic process that converts sugar to acids, gases, or alcohol. It occurs in yeast and bacteria, and also in oxygen-starved muscle cells, as in the case of lactic acid fermentation. Alcoholic fermentation is used in yeast and some other microorganisms and turns glucose into alcohol and CO2. The correct answer to the question is b. alcoholic and lactic acid.
Is fermentation an aerobic or anaerobic process? It is an anaerobic process because it happens in the absence of oxygen. The reactant, or starting material, shared by aerobic respiration and both types of fermentation is glucose. In lactic acid fermentation, which can occur in animal skeletal muscles, the glucose is converted into lactic acid. On the other hand, all forms of fermentation except for lactic acid fermentation produce gas, which is significant in some industrial applications, as well as the laboratory identification of bacteria.
This is a map that shows hot spots around the world.
Which phrases describe the formation of the Hawaiian
Islands? Check all that apply.
formed due to subduction
Iceland
formed in the middle of a plate
Yellowstone
Azores
Hawaii
formed at a divergent boundary
formed at a convergent boundary
Galapagos
formed where mantle erupts through crust
Answer:
- formed in the middle of a plate
- formed where mantle erupts through crust
Explanation:
The Hawaii Islands are a chain of volcanic islands. They have been formed by a hot-spot in the middle of an oceanic plate, the Pacific tectonic plate. The convection currents in the mantle are much stronger in this part, and it manages to easily break through the crust. As it does, the magma from the mantle has been rising the seafloor and as it was going up it emerged above the surface of the water, resulting in the formation of volcanic islands. Because the plate is moving over the hot-spot, the volcanoes are moved away and detached from the hot-spot, so they stop being active. The hot-spot though continues to propel magma upwards, so it forms new volcanic island, and the process goes on and on, so a chain of numerous volcanic islands is formed, and maybe a new continent in the future.
Answer:
- formed in the middle of a plate
- formed where mantle erupts through the crust
At the complete end of cellular respiration, how many molecules of ATP are produced? A. 26 B. 38 C. 15 D. 34
Answer:
The correct answer will be option B (38).
Explanation:
Cellular respiration or oxidation of glucose proceeds in three sequential reactions: .Glycolysis, Kreb cycle and Electron transport chain (ETC)
1 NADH₂ produces 3 ATP
1 FADH₂ produces 2 ATP
During Glycolysis produce -
NADH₂- 2 molecules =2x3 = 06 ATP
=2x4 = 08 ATP depending on shuttle system
ATP-phosphorylation = 02 ATP (utilized during process)
So, net ATPs synthesized in glycolysis are - 08 ATP.
During Link reaction and Krebs cycle -
NADH₂- 8 molecules = 8x3= 24 ATP
FADH₂- 2 molecules = 2x2= 04 ATP
ATP-phosphorylation= 02 ATP
so, net ATP produced in Link reaction and Krebs cycle are= 30 ATP
Hence, 08 ATP from glycolysis and 30 ATP from link and kreb cycle forms 38 ATP.
Thus, option B is the correct answer.
What form of anesthetic was used for field surgery
Answer: Anesthesia
Explanation:
Anesthesia was used in 95% of Civil War surgeries. Sulfuric ether had been discovered in Europe in the 1830's and was first used as an anesthetic by William Morton in 1846. After a successful public demonstration it became widely used in surgery.
How do organic compounds differ from inorganic compounds?
PLZ help answer !!!!!
why would being an angiosperm be an adaptation on land
A. it stops water from evaporating from leaves.
B. it helps the plant reproduce in a dry environment.
C.it helps the plant move water to the leaves.
D.it attracts mates to the plant more easily.
Answer:
It helps the plant reproduce in a dry environment. ( B.)