Humans have 23 pairs of chromosomes (46 total). How many chromo-

somes would a human cell have? Draw one chromosome for each case

a. at the end of mitosis?

b. at the end of meiosis I?

c. at the end of meiosis II?

The alleles for a trait are called

What do the interstitial cells produce? a. sperm b. inhibin c. androgens d. nutrients e. androgen-binding proteins?

DNA contains the blueprints for protein synthesis; however, proteins are produced in the ribosome. What role does RNA play in the protein synthesis?

A large granite batholith lies in south central Virginia, suggesting that there was once a A) lake. B) desert. C) volcano. D) peat bog.

What is the relationship between a mineral and a rock? A. They are the exact same thing. B. A mineral is a building block of rocks. C. Minerals are only silicates while rocks are nonsilicates. D.

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.