Allosteric inhibition generally results from
a. excess substrates.
b. binding of regulatory molecules at sites
other than the active sites.
c. a change in the temperature of the system.
d. a lack of coenzymes.
e. changes in pH
B
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At low population density, __________ is favored,
quickly producing as many offspring as possible. Fill in the blank(s) with the appropriate word(s).
Mycorrhizal sac fungi that live in association with oak and beech tree roots are
A. yeast. B. chytrids. C. truffles. D. ergot.
Which of the following features is NOT an advantage of an organism that has a viviparous life history?
A. The mother supplies the offspring with nourishment, even after birth. B. Development of the offspring occurs inside of the female. C. Offspring can live independently shortly after they are born. D. The eggs are retained within the body of the mother until the offspring are able to fend for themselves. E. The unborn offspring is supplied with a continuous flow of nutrients during development.
An organism has a relatively large number of Hox genes in its genome. Which of the following is not true of this organism?
A) It evolved from evolutionary ancestors that had fewer Hox genes. B) It must have multiple paired appendages along the length of its body. C) It has the genetic potential to have a relatively complex anatomy. D) At least some of its Hox genes owe their existence to gene duplication events. E) Its Hox genes cooperated to produce the positional patterns of this organism as it developed.