The process by which a phagocyte moves toward a chemical signal at the site of an infection is called
a. adherence.
b. digestion.
c. exocytosis.
d. elimination.
e. chemotaxis.
Ans: e. chemotaxis.
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When observing the skeleton of a snake, you see the remains of hip and hind leg bones associated with four legged animals. These bones are called ...
A. convergent traits. B. analogous structures. C. vestigial structures. D. homologous structures. E. both homologous and analogous structures.
A microbial mat
A. is a form of biofilm. B. is poorly organized. C. contains only obligate anaerobes. D. is constructed to prevent interactions between the various layers of microorganisms. E. is a form of biofilm AND is poorly organized.
Light consists of units of energy called
A. electrons. B. calories. C. neutrons. D. photons. E. pigments.
Chemical cycling may involve all but which of the following?
A. a biotic community in which chemicals move through food chains B. a reservoir unavailable to producers C. an exchange pool as a source from which organisms can acquire chemicals D. a geological component, in which chemicals move through the soil or the air E. All of the choices are correct.