The type of relationship between nitrogen fixing bacteria and the roots of various plants is ________
a. commensalistic
b. parasitic
c. None of these
d. predatory
e. mutually beneficial
e
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Different species of fruit flies occupy each of the islands in the Hawaiian island chain, a group of volcanic islands that formed one after the other
One hypothesis for how the different fruit fly species formed is that, after each new island was formed, fruit flies from existing islands colonized it and subsequently diverged. If this hypothesis is correct, it would be an example of: A. allopatric speciation by dispersal. B. allopatric speciation by vicariance. C. peripatric speciation by vicariance. D. sympatric speciation by dispersal. E. sympatric speciation by vicariance.
The pyrimidine bases are _______
A. cytosine, thymine, and uracil B. adenine and guanine C. adenine and thymine D. cytosine and guanine
Oxidative phosphorylation is the process by which ____
a. high energy NADH is made to supply the cell with its needed energy b. a final electron acceptor is used indirectly to facilitate the production of ATP c. ATP is made using high energy intermediates of cellular respiration d. specific enzymes are regulated to control cellular respiration e. NAD+ is regenerated to allow glycolysis to continue
Malaria is caused by Plasmodium falciparum, a non-motile protist that contains a cluster of microtubules at one end of the cell. Once injected into the blood stream, these microtubules are used to attach to red blood cells. Plasmodium falciparum is which of the following?
a. A protozoa b. An algae c. A slime mold d. A diatom e. An apicomplexan