Countercurrent exchange is a mechanism in which two adjacent currents flow in opposite directions and exchange materials. This mechanism can be found in
A. mammals.
B. birds.
C. fish.
D. worms.
E. sea anemones.
C. fish.
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Pelvic inflammatory disease may result from infection with ________.
A. Mycobacterium leprae B. Clostridium perfringens C. Staphylococcus epidermidis D. Neisseria gonorrhoeae
Joint (synovial) cavity
What will be an ideal response?
Most scientists agree that global warming is underway; thus, it is important to know how plants respond to heat stress. Which of the following would be a useful line of inquiry to try and improve plant response and survival to heat stress?
A) the production of heat-stable carbohydrates B) increased production of heat-shock proteins C) the opening of stomata to increase evaporational heat loss D) protoplast fusion experiments with xerophytic plants
Albinism, lack of pigmentation in humans, results from an autosomal recessive gene. Two parents with normal pigmentation have an albino child. What is the probability that their next child will be a wild type girl?
A) 1/4 B) 0% C) 1/2 D) 3/4 E) 3/8