Organisms that can manufacture their own chemical energy are called ________.

A. autotrophs
B. oligotrophs
C. heterotrophs
D. chemotrophs


Answer: A

Biology & Microbiology

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The firefly (Photinus†granulatus) and the zebra mussel (Dreissena†polymorpha) are both members of the kingdom Animalia. This indicates that they must also both be members of the same

A. species B. genus C. order D. phylum E. domain

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Bacteria transformed with plasmids are plated on growth medium containing ampicillin and X-gal. Blue colonies on

the plate contain bacteria with a ____ plasmid, meaning the lacZ+ gene is ____.

a. recombinant; deleted from the plasmid b. nonrecombinant; intact c. recombinant; intact d. nonrecombinant; disrupted by the inserted DNA fragment e. recombinant; disrupted by the inserted DNA fragment

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What is population variation?

a. variation between two adjacent populations b. variation that results from two populations mixing and interbreeding c. the distribution of phenotypes among individuals in a population d. a gradient of change from one edge of a population to the other

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Each gamete gets only one copy of an allele because it has ____

a. one copy of each chromosome b. one nucleus c. one chromosome d. a diploid number of chromosomes e. either an X or a Y

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