Saprobes are ________
a. fungi, animals, prokaryotes, or protists
b. all of the choices
c. chemoheterotrophs
d. decomposers
b
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A firefly is signaling by its tail light. He is saying,
A. "Don't follow so closely." B. "I'm ready, willing, and able, sexually." C. "Food—located one mile south." D. None of these—the flashes are burning of waste and are not associated with communication.
The major histocompatability (MHC) molecule is important in a T cell's ability to _____
A) distinguish self from nonself B) recognize specific parasitic pathogens C) identify specific bacterial pathogens D) identify specific viruses E) recognize differences among types of cancer
A carpel is the
a. same as a megasporophyll. b. structure producing pollen grains. c. component making up the anther. d. synonym for microsporophyll.
Plants do not grow well in soils with a lot of clay
because these soils a. hold onto and do not release water easily. b. are deficient in plant micronutrients and macronutrients. c. tend to absorb too much surface water. d. tend to become compacted and exclude air. e. do none of these.