Heterotrophs that obtain energy and carbon by feeding on both animal and plant materials are called ____
a. detritivores
b. herbivores
c. carnivores
d. omnivores
e. decomposers
ANSWER: d
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In the photosystem I reaction center, light energy captured by pigment molecules is passed to a special reaction center chlorophyll a called
A. P680. B. P700. C. chlorophyll I. D. chlorophyll II. E. retinal.
A taxis is distinguished from a kinesis because a taxis is ____ movement while a kinesis is ____
movement.
a. ordered; a change in the rate of b. a migratory; a local c. random; directional d. a group; an individual e. slow; fast
The main site of food absorption in the human digestive system is the
A. stomach. B. esophagus. C. small intestine. D. large intestine. E. rectum.
Methanogens can live only in ________ environments.
A. anaerobic B. microaerophilic C. aerobic D. All of the choices are correct.