If the human malaria parasite Plasmodium falciparum were the product of co-speciation, its closest relative would be found in:
A. mosquitoes.
B. gorillas.
C. chimpanzees.
D. orangutans.
E. pocket gophers.
C
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For microbial biodiversity studies, it is common to identify the ________ rather than the ________ as a measure of biodiversity
A) organisms themselves / genes B) genes / organisms themselves C) cell types / genes D) cell types / organisms themselves
Organisms that are characterized by being unicellular, photosynthetic, and having double shells made of silica are known as
A. dinoflagellates. B. diatoms. C. kelps. D. euglenoids. E. foraminifera.
Timber wolf populations are partially controlled by wolf behavior. For example, wolves form packs and are territorial. Therefore, only a finite number of wolves will comprise a pack and occupy a relatively large territory. Which of the following best describes this type of population-regulating mechanism?
a. competitive exclusion mechanism b. niche-controlling mechanism c. habitat-controlling mechanism d. extrinsic mechanism e. intrinsic mechanism
If Meselson and Stahl let replication proceed for one more round of replication (3 rounds) what fraction of the daughter DNA molecules would be of intermediate density?
A: None B: ½ C: ¼ D: 1/8