When a goose spots an egg outside of its nest, the goose gets out of the nest and rolls the egg back. Once started, a goose continues the egg-retrieval movement all the way back to the nest, even if the egg is taken away during the process. This is called:
a) step-wise reproductive collaboration.
b) repeated pattern fixation.
c) a fixed action pattern.
d) prepared learning.
e) supernormal stimulus.
Ans: c) a fixed action pattern.
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A key feature of all viral infections is the
A. integration of viral DNA into host DNA. B. disintegration of host DNA. C. addition of a lipid membrane to the virus. D. separation of viral nucleic acid from the capsid.
In the tryptophan operon, the repressor actively binds to the operator when:a
tryptophan binds to an allosteric site on the repressor. b. tryptophan levels are low. c. lactose levels are low. d. there is a great need for proteins. e. allotryptophan levels are low.
Which species interaction results in a negative impact on both species involved?
A. competition B. predator/prey C. parasite/host D. commensalism E. mutualism
Microbiologists study a variety of organisms, but all are considered either Bacteria or Archaea.
Answer the following statement true (T) or false (F)