Contact inhibition is an important mechanism for maintaining cell growth in developed organs and
tissues. As long as the cells remain in contact with each other they remain in ____ and are prevented
from dividing.
a. prophase
b. G1
c. G2
d. G0
e. S
D
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A dog cowering every time its abusive owner approaches is an example of ________. a. a fixed action pattern b. instinctive behavior c. None of these choices
d. imprinting e. habituation
The following compounds are produced by plants during the day and broken down at night, except _____________.
A. rubisco B. photosystem II C. ATP synthase D. photosynthetic proteins E. carbon dioxide
Which of the following is a possible future benefit of stem cell research?
A) developing a vaccine for cancer B) reversing damage from a heart attack C) generating embryos from nonliving tissue D) increasing a person's intelligence quotient
When a cell responds to a signal it sent, this is an example of
A. endocrine signalling. B. direct intercellular signaling. C. contact-dependent signaling. D. autocrine signaling. E. paracrine signaling.