Introduction of a single exotic predator is most likely to disrupt ecosystem function if the introduced species is a __________ predator.

A) large
B) vertebrate
C) invertebrate
D) keystone


Ans: D) keystone

Biology & Microbiology

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Two different species are crossed and the second generation (F2) illustrates reduced fitness. This is an example of

____.

a. behavioral isolation b. gametic isolation c. hybrid breakdown d. crossing over e. hybrid sterility

Biology & Microbiology

Blood transports 

A. nutrients, respiratory gases, and waste products. B. chemical messengers. C. heat. D. All answers are true.

Biology & Microbiology

Which of the following is an example of a metabolic activity that could be used to measure microbial growth?

A) standard plate count B) glucose consumption C) direct microscopic count D) turbidity E) most probable number (MPN)

Biology & Microbiology

A microbiologist is testing the drinking water for a municipality. What would be the best method for testing the purified water?

A. Measurement of microbial mass B. Direct microscopic count C. Membrane filtration D. Viable plate count

Biology & Microbiology