Which organizational unit includes the fewest species of organisms?
a. class
b. biosphere
c. community
d. population
e. ecosystem
d
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The ammocoete is the larva of
(a) lampreys. (b) sharks. (c) bony fishes. (d) amphibians.
Which of the following was first produced commercially using recombinant DNA technology?
A. hepatitis B vaccine B. interleukins C. human insulin D. human growth hormone
The scientists use a virus to insert the new DNA into the cabbage plant’s DNA. The insect
pests would be considered __________.
a. primary producers b. primary consumers c. secondary consumers d. tertiary consumers
Why is it the case that an instrumental variable is not found directly in the determining function?
A. If an instrument is exogenous, then it has an effect on the outcome just not a statistically significant one. B. If an instrument is relevant, then it has an effect on the outcome just not a statistically significant one. C. If an instrument is exogenous, then it has no effect on the outcome beyond those already in the determining function. D. If an instrument is relevant, then it has no effect on the outcome beyond those already in the determining function.