Which stimuli most directly causes the Venus flytrap to catch an insect?
a. gravity
b. light
c. touch
d. scent
e. sound
c
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A protozoan having a flagellum would be classified in the genus ________.
A. Plasmodium B. Entamoeba C. Toxoplasma D. Enterobius E. Trypanosoma
In most eumetazoans, the nervous system is derived mainly from which embryonic cell layer?
a. mesoderm b. epiderm c. mesoglea d. endoderm e. ectoderm
Which of the following is a key characteristic of the HIV virus that makes it so deadly?
A. The HIV virus contains a protein coat, or capsid. B. The HIV virus has a RNA genome. C. The HIV virus uses the enzyme reverse transcriptase for reproduction. D. The HIV virus can use the cellular machinery of the host cell they infected.
In order for the frequency of a particular allele in a population to increase,
A. the allele must be selected for. B. those having the allele must be better reproducers. C. the individuals without the allele do not compete as well. D. All of these answers are true.