Which progression represents the correct hierarchy of organization in the human body?

A) cells → tissues → organ systems → organs
B) cells → tissues → organs → organ systems
C) tissues → cells → organs → organ systems
D) tissues → organs → cells → organ systems
E) tissues → cells → organ systems → organs

How are scientists investigating the evolution of language?

A) by studying behavior in nonhuman relatives
B) by studying the genetics of language
C) by studying the evolution of the brain
D) all of the above

What is one of the very important differences between mitosis and meiosis?

A) Chromosomes align midway between spindle poles only in meiosis.
B) Homologous chromosomes pair up and exchange genetic material only in meiosis.
C) DNA is replicated only before mitosis.
D) Sister chromatids separate only in meiosis.
E) Interphase occurs only before mitosis.

What must occur during exercise to ensure adequate oxygen delivery to cardiac muscle?

A) An increased oxygen release to cardiac muscle
B) A decreased oxygen content to skeletal muscle
C) Decreased heart rate
D) Increased coronary blood flow

Bacteriophages attach to the cell walls of bacteria by envelope proteins.

Insulin stimulates cells to take in glucose by facilitated diffusion, so the down regulation of insulin receptors increases the ability of cells to take in glucose. __________________