If Raf is mutated so that it is "on" constitutively, what is the effect on the cell?
a) the cells lose growth control
b the cells dedifferentiate
c) the cells increase in volume permanently
d) the cells differentiate
e) the cells stop dividing
Ans: a) the cells lose growth control
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A. dry growing conditions B. areas that normally lack direct sunlight C. areas that get very little mineral content in the soils D. growing short branches E. lack of temperature changes
When young male white-crowned sparrows first begin to sing, they match their vocal output to ____
a. any birdsong they hear during their initial days of singing b. an instinctive blueprint of their species' song c. the memory of their species' song heard months earlier d. the memory of whatever song they heard during an early critical period e. the songs of male relatives heard during their initial days of singing
The color distribution in the fur of calico cats results
from a. hybridization. b. a specific nutritional deficiency. c. a genetic defect. d. X chromosome inactivation. e. selective breeding.
Deductive reasoning is used to make ________ based on a hypothesis
A) correlations B) data C) predictions D) statistical tests