Determinate cleavage takes place in ____ and is characterized by a pattern of development where the ultimate fate of
each cell is ____.
a. deuterostomes; not fixed until late in the developmental process
b. protostomes; not fixed until late in the developmental process
c. deuterostomes; fixed early in the developmental process
d. protostomes; fixed early in the developmental process
e. coelomates; fixed early in the developmental process
d
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Genome sequencing of the parasitic protist Plasmodium falciparum has been completed. One of the results is
A. Plasmodium is highly genetically similar to its host, Anopheles. B. Plasmodium is highly genetically similar to its host, Drosophila. C. Plasmodium has a chloroplast-like apicoplast that could be targeted by drugs. D. Plasmodium produces fatty acids that are similar to ones found in humans and could be targeted by drugs.
In fungi, a fruiting body is involved in
a. protection from drought and heat. b. protection from cold. c. reproduction. d. digestion. e. interactions with plants.
Nitrogen-fixing bacteria, in the roots of soybeans, help provide a source of nitrogen to the plants. In exchange, the bacteria obtain food from the plants. The bacteria are converting
A. ammonium (NH4) to nitrate (NO3). B. nitrate (NO3) to ammonium (NH4). C. nitrogen gas (N2) to nitrate (NO3). D. nitrogen gas (N2) to ammonium (NH4). E. nitrate (NO3) to nitrogen gas (N2).
You are doing research on a bacterial species, trying to determine the shape, distribution, and arrangement of a number of filamentous structures that protrude from the cell surface. Which type of microscopy would best enable you to do this?
A. bright-field microscopy B. scanning electron microscopy C. dark-field microscopy D. transmission electron microscopy