Small areas that are home to a large number of threatened species and an exceptional concentration of species found nowhere else on Earth are called
A) biomes.
B) movement corridors.
C) biodiversity hot spots.
D) local populations.
Answer: C
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Detecting a specific protein with an antibody is considered a(n) ________ method
A) selection B) screening C) isolation D) duplication
Autoimmune diseases are caused by the attack of
a. virus infections on joints and nerves. b. virus or bacterial infections on cells of the immune system. c. the immune system on viral-infected cells. d. a person's own antibodies on his own immune cells. e. a person's own immune cells on his own tissues.
If the long, bright tail feathers of male birds of paradise are a sexually-selected trait, what could predict if we experimentally removed those feathers from a group of male birds of paradise?
A. The experimental male would attract fewer mates, and thus produce fewer offspring B. The experimental males would die at a younger age, and thus produce fewer offspring C. The experimental males would be basically unaffected D. Both A and B would occur
Trichloroethylene (TCE) is toxic to humans because it
A. contains heavy metals. B. causes a decrease in the yield of crop plants. C. prevents CO2 production by plants. D. depletes nitrogen from soils. E. is carcinogenic.