Which of the following structures and functions is not associated with plasma proteins in a mammal?
a. pH buffering
b. Oxygen transport
c. Osmotic balance
d. Clotting agent
e. Antibody
Answer: b. Oxygen transport
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In the mammalian digestive system, what is the primary site of nutrient absorption?
A. pharynx B. stomach C. small intestine D. large intestine E. pancreas
When imbalances occur in the sex ratio of sexual species that have two sexes (that is, other than a 50:50 ratio), the members of the minority sex often receive a greater proportion of care and resources from parents than do the offspring of the
majority sex. This is most clearly an example of _____. A) sexual selection B) balancing selection C) stabilizing selection D) frequency-dependent selection
If the age-specific fertility rate is such that 100 females of age class x would produce 50 offspring, what is the contribution of age class x to the overall population growth rate?
A. 50 B. 2 C. 0.5 D. 0.75 E. cannot be calculated with this information.
Which of the following primarily enters a plant somewhere other than through the roots?
A) carbon dioxide B) nitrogen C) potassium D) water