Which animal is an induced ovulator?
A. dogs
B. apes
C. rabbits
D. humans
Answer: C
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You have been using massive amounts of weed killer and insecticide to kill weeds in your yard, as well as the grubs and aphids that are munching on your roses and your grass. What effect might this have from a microbiological standpoint?
A. Loss of microbial diversity in the soil B. Damage to the mycorrhizae C. Reduction in microbial numbers in the soil D. Damage to the nitrogen fixing bacteria E. All of the above may be effects of this practice.
Most cancers require at least two mutations: 1) one in an oncogene, which encodes proteins that trigger cell division,
and 2) one in a tumor suppressor gene, whose protein products, in their unmutated form, play a key role in preventing the cell cycle from progressing if the DNA is damaged or in the absence of specific cues. Which class of proteins might be considered tumor suppressors?
a. Cdk inhibitors b. cyclins c. growth factor receptors d. microtubules e. transcription factors
Side A is ____ to side B
a. hypertonic b. hypotonic c. isotonic d. either isotonic or hypertonic e. either isotonic or hypotonic
Each of the following activates a receptor tyrosine kinase except
A) EGF. B) PDGF. C) TGF? D) FGF. E) Insulin.