The switching between asexual and sexual
reproduction by water fleas is controlled by
a. epistasis.
b. pleiotropy.
c. incomplete dominance.
d. codominant inheritance.
e. environmental effects
E
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Which of the following is not an example of suction feeding?
A. trapping prey with blades of baleen B. rapid expansion of a fish's mouth to take in water and food C. insects obtaining a blood meal D. suckling of young mammals E. All of the answer options are examples of suction feeding.
Increased concentrations of CO2 (5% to 10%) and approximately 15% O2 produce an environ-mental condition that best suits which type of organism?
a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles
Stomata open when ________
a. solute concentration inside guard cells is low b. guard cells swell c. water is scarce d. guard cells shrink
The pyramid of energy illustrates
a. the first law of thermodynamics. b. the diminishing of usable energy as it is transferred through an ecosystem. c. that energy can be recycled. d. the biological magnification of materials in an ecosystem. e. the diminishing number of organisms at each trophic level