Primary consumers eat:
a. detritivores
b. decomposers
c. producers
d. other consumers
e. any organism that is at a different trophic level
c
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Transformation is the process where DNA is extracted from a plasmid
A. true B. false
"Sticky ends" are produced as a result of the action of ________
A) PCR B) DNA ligase C) restriction enzymes D) bacterial plasmids
An animal's somatic cells contain 2n chromosomes. What happens to the number of chromosomes in the animal's gametes?
A. the number is reduced to n by mitosis B. the number is reduced to n by meiosis C. the number is increased to 4n by mitosis D. the number is increased to 4n by meiosis
Which of the following about the pathogenesis of rabies is false?
A) a diagnostic sign of rabies is the formation of Negri bodies, small clusters of virus inside the neurons B) the rabies virus lyses host cells which explains neurological symptoms including pharyngeal spasms, confusion, loss of coordination, delirium, and the characteristic hydrophobia C) after invading brain cells, rabies spreads back out into the PNS where it replicates and is shed from tissues that are well supplied with nerves, including the salivary glands D) the virus slowly replicates in the muscle cells leading to a long incubation period that lasts from two months to a year E) the virus rapidly travels through neurons, replicating and spreading to the CNS