For a human baby to be born a boy he must receive

a. an X chromosome from the father.

b. a Y chromosome from the mother.

c. a Y chromosome from the father.

d. both an X and a Y chromosome from the father.

The changes in composition in an area over time is called

How many bases make up a codon? If you have 30 bases, how many amino acids would it code for?

Which of the following statement best describes ergonomics

The set of blood vessels with the slowest velocity of blood flow is

What structural differences suggest that eukaryotic cells evolved from prokaryotic cells?

Which class of immunoglobulins sensitizes cells to allergens?

Which statement about somatic mutations is true? A. They exist in all the cells of the body. B. They are acquired through exposure to mutagens. C. They are inherited via sperm and egg cells. D. They are passed on to offspring.

In year three the farmer discontinue the use of the insecticide Which statement would best predict the population in generation 4

What happens to carbon atoms during cellular respiration or fermentation?

How are photosynthesis and chemosynthesis similar?