An array of organisms together with their
physical environment is which of the
following?
a. population
b. community
c. ecosystem
d. biosphere
e. landscape
C
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What is the main difference between plant defense mechanisms that use secondary chemical metabolites versus plant defense mechanisms that use a systemic response?
A. The metabolites are not as lethal as the systemic response. B. The metabolites are present at all times, and the systemic response must be induced. C. The metabolites can only help in defense against insects, not against other plants. D. The metabolites are toxic to the plants that produce them, the systemic response is safer. E. The metabolites are a more reliable way to kill the invader.
Which of the following is an external stressor?
a. noise b. low blood sugar c. blood pressure d. salt concentrations e. pH
In DNA fingerprinting, amplified fragments of DNA are separated from one another by which process?
A) filtering B) chromatography C) electrophoresis D) PCR (polymerase chain reaction)
Proteins are the intermediary between a(n) ____________________ and a(n) ____________________
Fill in the blank(s) with correct word