How do corals react when water temperatures are too high?
A. They leave the shelter of the reef.
B. Corals release water at higher temperatures.
C. Symbiotic algae living within corals are expelled.
D. The metabolic optimum can adapt.
E. Corals are more pigmented at higher temperatures.
C. Symbiotic algae living within corals are expelled.
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Male peacocks have tail feathers that make up about 60% of their body length. During the mating season they shake these feathers in front of females
Longer feathers produce a larger volume of rustling sound for a given shaking rate, but they are also heavier, and thus require more energy to shake at a given rate than shorter feathers. This suggests that ______________. A. selective pressures will continue selection for longer and longer peacock tails B. selective pressures will always result in shorter peacock tails to reduce the energetic cost of shaking C. there are selective pressures against too long or too short of a tail, which results in the variable tail lengths D. tail length is completely random because there are selective pressures both for and against longer tails
The process of inducing a cutting from one plant to fuse with the tissues of another plant is called ____
a. root sucker propagation b. cloning c. vegetative reproduction d. tissue culture e. grafting
Which letter on the pedigree indicates an affected
male? a. A b. B c. C d. D e. E
________ nerves carry impulses away from the central nervous system.
A. Afferent B. Motor C. Sensory D. Involuntary