The region where freshwater from a river and saltwater mix is a(n):

a. limnetic zone
b. estuary
c. intertidal zone
d. upper littoral zone
e. profundal zone


b

Biology & Microbiology

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An autoimmune disease occurs when:

A. immune cells react too strongly with antigens normally present on host cells. B. there is an unregulated release of cytokine by helper T cells. C. cytotoxic T cells attack B cells. D. macrophages engulf normal host cells.

Biology & Microbiology

The hardening of the arteries is known as ____

a. arteriosclerosis b. atherosclerosis c. high cholesterol d. a heart attack e. angioplasty

Biology & Microbiology

Discuss how mutations in proteins can be used to examine the link between a person’s genotype and that person’s

phenotype. What will be an ideal response?

Biology & Microbiology

Which of the following represents a "new" taste category for taste buds described recently?

a. salty b. sweet c. glutamate d. bitter e. sour

Biology & Microbiology