The motile feeding stage of a protozoan is called
a. an apicomplexan.
b. a gametocyte.
c. a cyst.
d. a trophozoite.
Ans: d. a trophozoite.
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Four of the five choices listed below are related by
the same function. Select the exception. a. blood plasma b. carbaminohemoglobin c. oxyhemoglobin d. carbonic acid e. bicarbonate ions
Which eating disorder is most likely due to a person being depressed?
Select one: a. binge-eating disorder b. bulimia nervosa c. pica d. anorexia nervosa e. None of the answer choices is associated with depression.
Which of the following statements is TRUE of highly repetitive sequences?
A. They can be found millions of times in a eukaryotic genome. B. They typically decrease fitness of the organism. C. They play a vital role in transcription. D. They typically increase fitness of the organism. E. They play a vital role in translation.
Scientistslearned that cell death is a normal and even important part of life by studying the development of the nematode worm C. elegans. What was the most important feature of C. elegans for the study of programmed cell death?
(a) The nematode is smaller and simpler than the fruit fly. (b) 70% of C. elegans genes have homologs in humans. (c) The developmental pathway of each cell in the adult worm was known. (d) Its genome was partially sequenced.