A state or national park in your area conserves natural wildlife and plant florae in a community that remains fairly constant over time. This is an example of .
A. competitive exclusion
B. commensalism
C. an apparent climax community
D. species evenness
E. succession
C. an apparent climax community
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A condensed, female X chromosome is called a
a. Barr body. b. Morgan sphere. c. SRY gene. d. karyotype. e. linkage map.
What is the best way to promote fusion between two related populations of mosquitofish, one of which lives in a predator-rich pond and the other of which lives in a predator-poor pond?
A) Build a canal linking the two ponds that permits free movement of mosquitofish, but not of predators. B) Transfer only female mosquitofish from a predator-rich pond to a predator-poor pond. C) Perform a reciprocal transfer of females between predator-rich and predator-poor ponds. D) Remove predators from a predator-rich pond and transfer them to a predator-poor pond.
During breeding season, one should expect female house finches to prefer to mate with males with the brightest red feathers. Which of the following is true of this situation?
A) Alleles that promote more efficient acquisition of carotenoid-containing foods by males should increase over the course of generations. B) Alleles that promote more effective deposition of carotenoid pigments in the feathers of males should increase over the course of generations. C) There should be directional selection for bright red feathers in males. D) All three of these. E) Only B and C.
Cycles of fever, chills, anemia and headache along with passage of dark colored urine are the symptoms of infection with
A) yellow fever virus. B) P. vivax. C) P. ovale. D) P. falciparum. E) dengue virus.