A clownfish may lure fish towards a sea anemone and get scraps of food in return. What kind of symbiotic relationship does this demonstrate?
a. Commensalism
b. Mutualism
c. Parasitism
d. None of these choices
b
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Which one of the following is a term describing a multinucleated organism made up of a single cell?
A. colonial B. multicellular C. differentiated D. coenocytic
One of the reasons that pufferfish are a good species to compare to humans is because
A. it is so easy to hybridize the two and investigate the consequences. B. they are so distantly related that it's easy to distinguish mutually conserved sequences. C. the introns are often identical. D. of the rapid response time in pufferfish to artificial selection. E. they have been separated for so many millions of years and yet the gene sequence is almost identical.
Did increasing K affect the maximum growth rate (dN/dt) a population can exhibit? Hint: you may want to use Plot dN x t to get a more accurate measure of dN/dt and/or look at the data in tabular form
a. yes b. no
Which of the following is not one of the stages of HIV infection?
A. flat or raised lesions on the penis or vulva B. opportunistic infections C. a CD4 + T cell count between 200 and 499 per microliter of blood D. a greater than 500 CD4 + T cells per microliter of blood E. a CD4 + T cell count below 200 per microliter of blood