Diatoms ________.
A. are motile by virtue of having flagella
B. can reproduce asexually
C. are photosynthetic with frustules composed of two halves and can reproduce asexually
D. are photosynthetic with frustules composed of two halves
Answer: C
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The release of factors by cells that influence the activity of nearby cells is referred to as
A. autocrine signaling. B. paracrine signaling. C. pheromonal signaling. D. electrical signaling. E. exocrine signaling.
If an action potential persists for one minute or longer, an increase in the strength of synaptic connections develops
Which term describes the resulting establishment of memory between two neurons?
a. lateralization b. consciousness potentiation c. long-term potentiation d. long-term association e. cephalization association
In a colony of 100 guinea pigs, 16 show the recessive trait of bristly hair. What is the percentage of
heterozygotes in the population?
a. 48 percent b. 52 percent c. 36 percent d. 24 percent e. 84 percent
Which of the following does not enable bacterial endospores to be heat resistant?
A) high amount of dipicolinic acid B) peptidoglycan C) spore coat D) exosporium E) low water content