Organisms have two homologous chromosomes for every chromosome because:

A. They replicate their chromosomes (DNA) prior to cell division

B. They get one from each parent during fertilization

C. The more the better

The growth factor RGF stimulates proliferation of cultured rat cells. The receptor that binds RGF is a receptor tyrosine kinase called RGFR.

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What are alleles? genes for different traits, such as hair color and eye color B. recessive forms of a kind of characteristic carried by genes C. alternative forms of a gene for a single trait, such as blue eyes or brown eyes D.

1. The products in cellular respiration are A carbon dioxide, water, and ATP B carbon dioxide and glucose C glucose and oxygen OD water, oxygen, and ATP

What happens to dna before cell division?

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.