The genus Arthrobacter ________.
A. is a significant component of the microbial flora of soil and plays an important role in the degradation of some herbicides and pesticides
B. is a significant component of the microbial flora of soil
C. forms heat-resistant endospores
D. plays an important role in the degradation of some herbicides and pesticides
Answer: A
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If cowbird eggs are included in an oropendola nest in the open woodlands of Central America, what
would be the expected outcome?
a. The cowbird eggs would be ejected from the nest to eliminate the competition. b. The cowbird eggs would be ejected from the nest due to a reaction of the mother bird's immune system. c. The cowbird eggs would not be ejected from the nest because they provide an additional food source. d. The cowbird eggs would not be ejected from the nest because they provide protection from large predators. e. The cowbird eggs would not be ejected from the nest because they provide protection from parasites.
During parturtition, mechanical pressure
caused by the movement of the fetus through the uterus causes the release of ___ from the ___.
a. HCG---hypothalamus b. oxytocin---posterior pituitary c. oxytocin---hypothalamus d. HCG---posterior pituitary e. oxytocin---adrenal cortex
If the heterozygous phenotype is intermediate between those of the two different homozygotes, this is called Select one:
a. epistasis. b. independent assortment. c. codominance. d. incomplete dominance. e. polygenic.
A competitive inhibitor interferes with:
A. the oxidized site of the enzyme so a substrate cannot bind B. the active site of the enzyme so a substrate cannot bind C. the reduced site of the enzyme so a substrate cannot bind D. the allosteric site of the enzyme so a substrate cannot bind E. the repressor site of the enzyme so a substrate cannot bind