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:
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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.
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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Ian experiences pain in his leg after a fall, so he goes to the doctor. After an exam, the doctor explains to Ian that he has injured a piece of tissue that connects his leg muscle to bone. What piece of tissue is the doctor describing?
Answer:
Tendon or a connective tissue
Explanation:
Tendons are a type of connective tissue that attaches muscle to bones. They are strong, fibrous and flexible. They also attach muscles to other organs. Tendons have a high tensile strength which is useful to withstand muscle contractions. They are made up of bundles of connective tissue that contribute to its strength.
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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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 of the following best describes the Expensive Tissue Hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that Homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.
Answer:
The correct option is this: BRAIN REQUIRES MORE ENERGY, SO THE GUT HAD TO BE REDUCED AND LARGER BRAINS AND TOOL USED LED TO HIGHER QUALITY DIETS.
Explanation:
The Expensive Tissue Hypothesis is an hypothesis that relates the relationship between the brain and the gut during the period of human evolution. The hypothesis submits that in order for human to develop a larger brain without increasing his metabolic rate, he has to use less energy on other expensive tissues such as gut. Thus, the hypothesis suggests that human evolve a larger brain and make up for this development by evolving a gut that need less energy and by eating higher quality foods that are obtained by mean of using agricultural tools.
What is the smallest unit of life in the human body?
The cell is the smallest unit of life in the human body is capable of independent existence and comprises all living things as well as the body's tissues.
What is a cell?The cell membrane, nucleus, and cytoplasm make up a cell's three basic structural components. The cell membrane, which encloses the cell, regulates the molecules that enter and exit the cell.
The fact that cells come in distinct, distinguishable packets helps explain why they are regarded as the foundational components of life.
This is due to the fact that every cell is surrounded by a component called the cell membrane, which, like a house's walls, acts as a definite partition between the inside and outside surroundings of the cell.
Therefore, cells in the human body are capable of independent existence and comprise all living things as well as the body's tissues.
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The smallest unit of life in the human body is the cell. All types of cells have common features, which include a nucleus and cytoplasm, that perform vital functions necessary for life.
Explanation:The smallest unit of life in the human body is the cell. Cells form the foundation for life and carry out all the key functions necessary for living organisms.
There are many types of cells in the human body, each with its own function. For example, red blood cells transport oxygen, while skin cells protect the body from external danger.
Despite their differences, all cells share common features such as a nucleus which contains DNA, and cytoplasm which includes the machinery for cell functions.
These components, along with many others, work together to maintain life at the most basic level.
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Alcohol builds up in the bloodstream after a person consumes more than how many drinks per hour? 1 2 3 4
Answer:
Option B, 2
Explanation:
As per the standard rule if a person taken one drink per hour then he/she gets enough time to burn off the alcohol consumed irrespective of number of drinks taken at the same rate. Hence, there is no accumulation of alcohol in the body.
However, if a person intakes more than one drink per hour then alcohol starts building/accumulating with in the blood stream. After consuming 2 drinks per hour , one is dissolved but the other one accumulates.
Hence, option B is correct.
The human body can metabolize approximately one standard drink per hour. Consuming more than this causes alcohol to build up in the bloodstream, with potential negative effects such as reduced reaction times and lowered alertness. Factors such as body weight, genetics, and consumption rate can affect how quickly alcohol is metabolized.
Explanation:Alcohol is metabolized and removed from the body at a certain rate; this rate slightly varies between individuals, typically being slower in women compared to men. On average, the human body can metabolize approximately one standard drink per hour. Drinking more than this will cause alcohol to build up in the bloodstream, resulting in higher blood alcohol concentrations. Consider that factors such as body weight, genetics, and consumption rate may also affect how quickly one can metabolize alcohol.
Drinking more than the body can metabolize can lead to riskier effects. Some effects of consuming a large quantity of alcohol include decrease in visual acuity, slow reaction times, lowered alertness, and loss of behavioural control. Excessive consumption can result in complete loss of consciousness and in some cases, can lead to health problems such as Fetal Alcohol Spectrum Disorder (FASD) in infants if consumed by a pregnant woman.
It's important to be aware of one's own drinking habits and the potential effects. Practicing moderation and understanding the body's limits when it comes to alcohol can help promote healthier and safer behaviour.
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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
Which structure or substance is responsible for helping filter and clean air as it passes through the trachea and bronchioles?
A. Cilia
B. Saliva
C. Nasal passages
D. Alveoli
Answer: A
Explanation:
because the cilia is in the trachea and it pushes foreign things out as it breathe in air and it pushes out things such as dust and all that
Answer: Cilia
Explanation: Respiration can be defined as the phenomenon in which the exchange of gases takes place between the lungs and outer environment.
The process by which the air is inhaled is known as inhalation and the process y which carbon dioxide is moved out of the body is known as expiration.
The whole of the respiratory track is ciliated that protects the nasal passage by the entrance of the harmful pathogens, dirt and foreign particles. It propels out the foreign particles out of the body by the back and forth movement.
How do organic compounds differ from inorganic compounds?
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.
Which statement best describes why carbon can form a wide variety of organic compounds? Each carbon atom ionically bonds with atoms of carbon, hydrogen, oxygen, and nitrogen. Each carbon atom covalently bonds with atoms of carbon, hydrogen, oxygen, and nitrogen. Each carbon atom ionically bonds with atoms of oxygen and nitrogen. Each carbon atom covalently bonds with atoms of oxygen and nitrogen.
Answer:
Carbon can form a wide variety of organic compounds because:
Each carbon atom covalently bonds with toms of carbon, hydrogen oxygen, and nitrogen
A carbon atom can have 4 single valence electrons around it. This allows it to form covalent bonds with many different atoms.
Explanation:
Please mark brainliest and have a great day!
Answer:
the answer is "B" on edge
Explanation:
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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.)
How often does the total volume of blood circulate through the system?
Answer:
obese kids per happy meal
Explanation: ok/hm
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.
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's the waste product of electrons and pyruvate combining in fermentation?
Answer:
Lactate
Explanation:
Under the conditions of oxygen scarcity, pyruvate does not enter the Kreb's cycle in the form of acetyl CoA. Rather pyruvate is reduced into lactate by accepting the electrons from NADH. Reduction of pyruvate and oxidation of NADH form lactate and NAD+. The process is called lactic acid fermentation.
Here, the NAD+ enter the glycolysis to continue the energy production while lactate is a waste product.
Radio tagging of animals is a way to save many endangered animal species. How do scientists use radio tagging to help them save animals? A) Scientists can track the movements of the endangered animals. B) Scientists can study the movements of the animals' predators. C) Radio tags act as bait for the prey of these endangered animals. D) Radio tags keep the predators of the tagged animals away from them.
Answer:
A) scientist can track the movements of the endangered animals
Explanation:
to monitor them
The term facultative anaerobe refers to an organism that
Answer: It could be referred as an organism that lives in an oxygenated environment.
Explanation: It could be referred as what I said above, because, if oxygen is not present it could die.
A facultative anaerobe is an organism that can survive and grow in both the presence and absence of oxygen.
A facultative anaerobe is an organism that can survive and grow in both the presence and absence of oxygen. These organisms have the ability to switch between aerobic and anaerobic respiration depending on the availability of oxygen. They are capable of living in environments with or without oxygen, and can utilize different metabolic pathways to produce energy.
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What substance in the leaves gives them a green Colour?
_____ 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 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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_____ 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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If a red cow (homozygous dominant) is crossed with a white cow (homozygous dominant), what alleles will the offspring have?
Answer:
They would get one allele from each parent.
Explanation:
Because each parent is honozygous dominant, this means that each parent has a pair of the same allele. For example, RR for red cow and WW for white cow. So if we cross them, all their off springs will have a combination of RW.
W W
R WR WR
R WR WR
Answer:
RW
iam really sure
Explanation:
If a red cow (homozygous dominant) is crossed with a white cow (homozygous dominant), what alleles will the offspring have?
Rw
RW
rW
rw
Scientists are conducting a study on the effectiveness of a new drug on memory loss. They are giving some of the test subjects the new drug to find out if it improves their long-term memory.
Which are possible limitations of this study? Check all that apply.
A) Test subjects may want to participate in additional experiments.
B) Test subjects may think they should be paid more.
C) Test subjects may get bored and want to quit early.
D) Test subjects may have to travel during the experiment.
E) Test subjects may have full-time jobs.
This is multiple choice. Thank you for the help!
Answer:
the answer is c) Test subjects may get bored and want to quit early.
Explanation:
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.
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:
occurs at a constant rate
Explanation:
Radioactive dating is the use radioactive decay to determine the age of samples or substances.
Radioactive dating is the process of determining the age of a sample or substances based on the radioactive isotopes found in that substance and the radioactive decay constant or rates.
The elements that are used in radioactive dating is Carbon, Potassium and Uranium.
Radioactive decay is a very accurate means of determining the age of a samples because of the constant rate at which it occurs.
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.
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.