The area where open water fish roam is known as ____
a. the pelagic province
b. the intertidal zone
c. the neritic zone
d. hydrothermal vents
e. the benthic province.
ANSWER: a
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Studies of the Pax6 gene and its homologs suggest that
A. the eye has evolved independently multiple times. B. the eyes of many different species are descended from a common ancestor. C. the master genes of the eye in various species are not homologous. D. the simple eyes of invertebrates and complex eyes of vertebrates arose from two different ancestral control genes.
After you eat lunch, the nutrients in your food are released in the digestive process and eventually make their way into the blood. The rising nutrient levels quickly move beyond the standard homeostatic range. Normally, a hormone would be released at this time to regulate these nutrients. Imagine that in your case, that return to homeostatic levels does not occur. What hormone would you need to receive to return blood levels to normal?
A. glucagon B. insulin C. cortisol D. epinephrine E. growth hormone
Which statement best describes the purpose of DNA profiling?
DNA profiling amplifies a specific sequence of DNA. DNA profiling is done to detect specific sequences of DNA. DNA profiling is done to determine the sequence of nitrogenous bases in DNA. DNA profiling is done to demonstrate patterns of DNA fragments in a gel that are unique to an individual organism.
Compare and contrast conventional and costly signals. Which statement is incorrect?
a. Both signals elicit costs during either production (honest signal) or use (dishonest signal). b. Both signals are energetically costly to produce. c. The meaning of conventional signals is not intrinsically connected with the structure. d. Not communicating at all may provide more fitness than communicating with a costly signal.