When individuals of a species do not form close pair bonds, and both males and females mate with multiple partners,
the species’ mating system is described as promiscuous.
a. True
b. False
ANSWER: True
Biology & Microbiology
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Eight hundred million years ago, what change in atmospheric conditions coincided with an increase in eukaryotic diversity?
A. decrease in CO2 B. increase in O2 C. increase in sulfur D. None of these choices are correct.
Biology & Microbiology
An arrowworm is a type of planktonic
a. herbivore. b. detritivore. c. carnivore. d. omnivore. e. filter feeder.
Biology & Microbiology
Which chemicals are natural pain suppressors?
a. substance P b. bradykinins c. prostaglandins d. histamine e. endorphins
Biology & Microbiology
Infectious dose of 50% (ID50) refers to the number of microorganisms required _________
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology