A group of whales is called a
a. harem.
b. pod.
c. covey.
d. herd.
e. bevy.
B
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According to the logistic growth equation, = rmaxN,
A) the number of individuals added per unit time is greatest when N is close to zero. B) the per capita growth rate (r) increases as N approaches K. C) population growth is zero when N equals K. D) the population grows exponentially when K is small. E) the birth rate (b) approaches zero as N approaches K.
The main form of nitrogenous wastes released by mammals to their environment is ____
a. nitrate b. ammonia c. uric acid d. amino acids e. urea
In the lac operon, if lactose is present, which of the following occurs?
A. Lactose bind to RNA polymerase, which then binds to the promoter and transcribes the needed genes. B. Lactose binds to the repressor, changing its shape so that it does not bind to the operator. RNA polymerase then transcribes the needed genes. C. Lactose binds to the operon, which attracts RNA polymerase, then transcription of the needed genes occurs. D. Lactose binds to the repressor, changing its shape so that it can bind to the operator and the structural genes are not expressed.
Retroviruses make __________ by the process of __________
a. RNA copies of DNA; reverse transcription b. DNA copies of RNA; reverse transcription c. genetic probes; Southern blotting d. genetic probes; Northern blotting e. telomerase; mutagenesis