Headwater streams depend primarily on __________ as an energy input

a. photosynthesis
b. detritus
c. phytoplankton
d. zooplankton
e. nekton


B

Biology & Microbiology

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Free energy change is related to the equilibrium constant for a specific reaction.

Answer the following statement(s) true (T) or false (F)

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A gram-negative, spiral-shaped organism is isolated from a stool sample that was hippu-rate-positive, catalase-positive, susceptible to nalidixic acid, and resistant to cephalothin. The organism can be identified as:

a. Campylobacter coli. b. C. jejuni subsp. doylei. c. C. jejuni subsp. jejuni. d. C. fetus subsp. fetus.

Biology & Microbiology

Which one of the following traits would be found in a typical fern but not a moss?  

A.  homospory B.  tracheids C.  gametophytes with rhizoids D.  antheridia E.  a sporophyte generation

Biology & Microbiology

Which of the following describes a trophoblast?

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Biology & Microbiology