Which types of organisms are found at the base of a grazing food web?
a. decomposing organisms
b. secondary consumers
c. photosynthetic organisms
d. predators
c. photosynthetic organisms
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The major defining characteristics of arthropods are (select all that apply)
A. their jointed legs. B. the chitin that forms their exoskeleton. C. their complex mouthparts. D. their trochophore larvae. E. metamorphosis.
Radiolarians have characteristic ____, which are thin, ray-like strands of cytoplasm supported
internally by bundles of ____.
a. axopods; microfilaments b. axopods; microtubules c. spicules; microfilaments d. spicules; microtubules e. microfilaments; axopods
The process illustrated in the accompanying figure is representative of:
a. neuroendocrine signaling.
b. paracrine regulation.
c. cAMP as a second messenger.
d. classical endocrine signaling.
e. autocrine regulation.
A young woman who was recently hiking in the mountains and discovered a tick on her torso has a fever that came on quite suddenly. She has no rash, but she develops leukopenia. Which of the following diseases is she most likely to have contracted?
A. anaplasmosis B. Lyme disease C. relapsing fever D. Rocky Mountain spotted fever E. scrub typhus