The tropical supralittoral zone immersed only at the highest spring tides is the:
a. brown.
b. white.
c. gray.
d. black.
e. yellow.
D
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When the amount of oxygen in the blood falls, the kidneys release ____
a. oxygen b. erythropoietin c. carbon dioxide d. iron e. growth hormone
Which one of the following human proteins, produced by transgenic bacteria, is used to prevent or break down blood clots?
A) insulin B) tissue plasminogen activator C) erythropoietin D) growth hormone E) factor VIII
A keloid is defined as a(n):
a. excessive collage formation that often results in a hard, raised scar b. fibrous bands that can form internally after surgery c. tissue separation d. part of the healing process of larger scars
Although common in the past, today microbial mats develop ONLY in aquatic environments where
a. sulfide levels are low. b. the temperature is elevated. c. conditions restrict grazing and competition. d. conditions are hypersaline.