which one of the following cells are the product of meiosis? group of answer choices bacterial cells blood stem cells sperm cells liver cells all of thesea) sperm cellsb) liver cellsc) red blood cellsd) all of the above

Answer:

Oxygen liberated during photosynthesis comes from the splitting or hydrolysis of water in the green plants. Cornelius van Niel experimentally proved for the first time that the oxygen liberated during photosynthesis comes from water and not from carbon dioxide.

Answer:

Oxygen liberated during photosynthesis comes from the splitting or hydrolysis of water in the green plants.

Oxygen is just a by product of this splitting, and will be removed from the plant.

it was proven by Cornelius Van Niel that oxygen liberated during photosynthesis comes from water not carbon dioxide

When two dominant alleles for a feature are present in an organism, the genotype is referred to as dominant homozygous. Using the example for eye color, the letter BB is used to represent this genotype.

A gene's two distinct alleles in one location. An heterozygous genotype can have two separate alleles that are mutants (compound heterozygote) or one normal allele and one mutant allele.

possessing two identical copies of the same gene—one inherited by the mother as well as one from the father—is referred to by this phrase. Either both genes of a homozygous genotype are normal and both genes share the same mutant (change).

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Answer:

A-G-T-C-G-T

Explanation:

An easy way to remember is: car in the garage for c and g, apple in the tree for a and t.

"it is a reductive process"

Explanation:

both oxidation and reduction take place in photosynthesis so we cannot classify it as just reductive.

in photosynthesis the water is oxidised while co2 is reduced. this basically transforms co2 into glucose and water into oxygen

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The answer law because it has be scientifically proven and has been used over time generally in all spheres

Explanation:

Law

Answer:

2000 km/s

Explanation:

the formula for speed is speed=distance/time, this is the formula that should be used here. 50,000/25, which equals 2,000

Answer:

C:  proteins & nucleic acids

Explanation:

Answer:

its 1.

Explanation:

i had a question similar to that one

I suggest use the condon charts in boxes

The Cyanocytta crystal commonly known as a Blue jay is native of eastern North America, it lives in deciduous and coniferous forests, though can be found in certain urban areas. It feeds mostly on seeds, sometimes even stockpile generating seed banks, or on rare occasions can feed on small invertebrates and vertebrates si can be considered as mainly a primary consumer.

Answer:

b. is the correct answer

Answer:

b

Explanation:

Answer: Crop-rotation , Fertilizers and manure and Growing Legumes

Explanation:

There are different ways of replenishing nutrients in the soil and they are : Crop-rotation , use of fertilizers and manure and  growing Leguminous Plants. Crop rotation replenishes nutrients in the soil by keeping the soil fertile through-out the year . One season you may plant a crop that drains nutrients from the soil then the next season a crop that gives back nutrients .The use of fertilizers and manure . Fertilizers increase crop yield and manure helps to keep the land fertile and provide essential nutrients like phosphorous. Growing leguminous plants .

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The result of excitation-contraction coupling is the contraction of muscle fibers. Excitation-contraction coupling is the process by which an action potential (excitation) leads to the generation of force (contraction) in muscle cells.

Here's how excitation-contraction coupling works:
1. An action potential is generated in the muscle cell membrane, usually initiated by a motor neuron.
2. The action potential propagates along the muscle cell membrane and deep into the cell through specialized invaginations called T-tubules.
3. The action potential in the T-tubules causes voltage-gated calcium channels in the adjacent sarcoplasmic reticulum (SR) to open.
4. Calcium ions (Ca2+) are released from the SR into the cytoplasm of the muscle cell.
5. The increase in intracellular Ca2+ concentration triggers a series of events that ultimately lead to muscle contraction.
6. Calcium ions bind to a protein called troponin, which is part of the thin filaments within the muscle cell.
7. The binding of calcium to troponin causes a conformational change in another protein called tropomyosin, which uncovers the active sites on the actin filament.
8. Once the active sites are exposed, myosin heads from the thick filaments bind to the actin, forming cross-bridges.
9. ATP is hydrolyzed, allowing the myosin heads to pull on the actin, resulting in muscle contraction.
10. The cycle of myosin binding, pulling, and detachment continues as long as calcium and ATP are available.

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Answer:

1:2:1

Explanation:

It describes the number of times a genotype would appear in the offspring after a test cross. For example, a test cross between two organisms with the same genotype, Rr, for a heterozygous dominant trait will result in offspring with genotypes: RR, Rr, and rr. In this example, the predicted genotypic ratio is 1:2:1.

Answer:

The sun has an arrow leading to the decomposer, the sun should be at the bottom of the pyramid

Explanation:

The sun is the ultimate source of energy that provides energy to the producers. The producers use the light energy to synthesize the chemical compound. The energy from the producers is transferred to the primary consumers and their energy is transferred to the next levels. The sun cannot be decomposed by decomposer so the arrow from the sun leading towards the decomposer is not right.

Answer:

Abiotic and biotic factors make up an ecosystem. Abiotic factors are the non-living parts of an environment. These include things such as sunlight, temperature, wind, water, soil and naturally occurring events such as storms, fires and volcanic eruptions. Biotic factors are the living parts of an environment, such as plants, animals and micro-organisms.

Together, they are the biological factors that determine a species' success. Each of these factors impacts others, and a mix of both is necessary for an ecosystem to survive.

Answer:

The primary consumers a mostly herbivores and the secondary consumers are mostly carnivores

Answer:

Primary consumers, also known as herbivores, are organisms that primarily consume plants as their main source of energy and nutrients. These consumers are at the base of the food chain and play a vital role in maintaining the balance of the ecosystem. On the other hand, secondary consumers, also known as carnivores, are organisms that primarily consume primary consumers as their main source of energy and nutrients. These consumers are one level higher in the food chain and play a crucial role in controlling the population of primary consumers.

One key difference between primary and secondary consumers is the type of food they consume. Primary consumers only consume plants, while secondary consumers consume both plants and primary consumers. Another difference is their position in the food chain. Primary consumers are at the bottom of the food chain, while secondary consumers are one level higher.

In summary, primary consumers are herbivores that consume plants, while secondary consumers are carnivores that consume both plants and primary consumers. These two types of consumers play vital roles in maintaining the balance of the ecosystem and are essential for the survival of all organisms in the food chain.

Answer:

this would be layer 1

Explanation:

it is closest to the surface which means it will have the most recent fossil if you had a question that said what layer has the oldest fossils it would be 4

The vast majority of polypeptides contain between a. 100 and 1000 amino acid residues

Polypeptides are chains of amino acids linked together by peptide bonds, which are the building blocks of proteins. They play essential roles in various biological processes and have diverse functions, including enzyme catalysis, cell signaling, and structural support. The size of polypeptides can vary greatly, but most fall within the range of 100 to 1000 amino acid residues, which allows for adequate complexity and functionality.

While smaller polypeptides with 10 to 50 (Option D) or 50 to 100 (Option E) residues do exist, they are less common. Polypeptides containing 1000 to 2000 (Option B) or 2000 to 34,000 (Option C) residues are much rarer and typically comprise larger protein complexes or highly specialized functions. Overall, the vast majority of polypeptides consist of a. 100 to 1000 amino acid residues.

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In order to meet a genetic equilbrium, a population should:

1. Have no changes in the DNA sequence.

2. Be a very large population.

3. Perform random mating.

4. Have no migration movements taking place.

5. Have no natural selection occuring.

Answer:

A hypothesis is either a suggested explanation for an observable phenomenon, or a reasoned prediction of a possible causal correlation among multiple phenomena. In science, a theory is a tested, well-substantiated, unifying explanation for a set of verified, proven factors.

Answer:

The outcome of a frameshift mutation is complete alteration of the amino acid sequence of a protein. This alteration occurs during translation because ribosomes read the mRNA strand in terms of codons, or groups of three nucleotides. ... Each word itself has a separate meaning, as each codons represents one amino acid.

Explanation:

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In the given DNA sequence GCT ATA TCG, the second codon is changed from ATA to АТТ.

This change would affect the products of translation, which are the amino acids. To determine the amino acids, we need to refer to the genetic code, which translates each codon into a specific amino acid. The codon ATA corresponds to the amino acid isoleucine (I), while the codon АТТ also corresponds to isoleucine (I).

Since both codons, ATA and АТТ, code for the same amino acid (isoleucine), the change in the second codon would not affect the amino acids produced during translation. Therefore, the products of translation, the amino acids, would remain unaffected by this change.

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Answer:

Out

Explanation:

If the mass is less that means there is less water on the inside of the cell and more water on the outside. also because there is less water outside the cell, due to the properties of osmosis, it would tracel out.

Answer:

Cancer drugs

Explanation:

3a) Monoclonal antibodies are combined with cancer drugs to find where the cancer cells. The cancer drugs act as a radar or map for the monoclonal antibodies.

3b)  Pretty much the same thing. They are attached with the platelets and they act as a radar or map etc.

Answer: the answer is b

Explanation:

The concentration of myoglobin measured via these two methods is different because the Soret band absorbance relies on the absorbance of light by the heme group in myoglobin, while the Bradford method measures the binding of Coomassie Brilliant Blue dye to proteins.

The Soret band absorbance method measures the absorption of light at a specific wavelength that corresponds to the heme group of myoglobin. This method is specific to myoglobin and provides an accurate measurement of its concentration.  On the other hand, the Bradford method measures the concentration of proteins based on the binding of Coomassie dye to amino acid residues, which can result in varying levels of specificity and accuracy for different proteins. Therefore, the concentration of myoglobin determined by the Bradford method may be affected by the presence of other proteins in the sample, leading to a different measurement compared to the Soret band absorbance method. These two methods also differ in their -

In summary, the differences in myoglobin concentration measurements between the Soret band absorbance and the Bradford method can be attributed to their differing principles of measurement, sensitivity, interference, and sample preparation.

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Answer:

increased stability in the ecoystem

Answer:

Mutation

Explanation:

The main cause of variation within a population is usually through genetic mutation.

Mutation is the alteration of the genetic sequence within an organism. It often lead to formation of new genetic patterns and codes.

Most times, environmental influences are paramount to causing genetic mutation within a population.

Other times, it might be due to competition and some other internal factors.

Mutation can be transferred from parents to offspring in most cases.

Answer: The first two are wrong. The unique chain/sequence of amino acid monomers that form a polypeptide monomer are what fold the protein into its UNIQUE shape. Proteins can be modified in the golgi apparatus to best suit their function.

(a level answer)

A possible explanation for why evolution would favor longevity is "those who live longer have stronger genes to pass down to their children".

Longevity, or the ability to live a long life, can be an advantageous trait in evolution because it allows individuals to survive and reproduce over a longer period of time, increasing the likelihood that they will pass on their genes to future generations.

Individuals who possess genetic traits that promote longevity are more likely to live longer and reproduce more, which can increase the frequency of these genes in the population over time.

While the other options listed may also have some impact on the survival and reproductive success of individuals, they do not directly explain why evolution would favor longevity as a trait.

For example, while having older people around to care for children may increase children's survival rate, this does not necessarily translate into an advantage for individuals who live longer themselves.

Similarly, while living in larger groups may increase safety and reduce the risk of predation, this does not necessarily relate to an advantage for individuals who live longer.

The idea that the brain grows as we get older is also not universally true and does not necessarily provide an evolutionary advantage for longevity.

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