The component in the highest concentration in plasma is __________
a. water
b. plasma proteins
c. erythrocytes
d. leukocytes
e. salts
A
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Which of the following do airborne microorganisms and microorganisms on light-exposed surfaces use to protect themselves from photooxidation?
A. Catalase enzymes B. Superoxide dismutase C. Carotenoid pigments D. Peroxidase enzymes
The distribution of cytoplasm to daughter cells is accomplished during
A) mitosis B) meiosis C) cytokinesis D) karyokinesis
Sea otter populations were reduced by overhunting, allowing an overgrowth of one of their prey
animals, the ____, which consumed populations of ____ and decimated them.
a. crabs; shrimp b. abalone; algae c. sea urchin; kelp d. harbor seals; fish e. crab; kelp
Why do mammals adapted to dry climates tend to have considerably more long-looped nephrons than those adapted to wet climates?
A) So that their blood pressure does not drop to dangerously low levels during periods of drought B) So that a lower concentration of salt can be produced in the interstitial fluid of the kidney medulla, causing less water to be reabsorbed into the capillaries C) So that the wastes can be excreted as uric acid instead of urine D) So that the excess urea they produce as a result of dehydration can be properly filtered by the nephrons and excreted E) So that a higher concentration of salt can be produced in the interstitial fluid of the kidney medulla, causing more water to be reabsorbed into the capillaries