According to the blending theory of inheritance that predominated before 1900, what colour of progeny would result from the mating of a white flower and a red flower?
a. white
b. pink
c. red
d. some white, others red
Answer: b. pink
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Intervening sequences that are transcribed, but not translated into protein are called
A. exons. B. introns. C. splicesomes. D. transposons. E. transcription factors.
If you placed a red blood cell in a hypotonic solution, you would predict that its volume would ____ while the solute concentration in its cytoplasm would _____.
A. increase, increase B. increase, decrease C. decrease, increase D. decrease, decrease E. decrease, not change
Gases such as oxygen and carbon dioxide can pass through a plasma membrane by simple diffusion, because they are uncharged, nonpolar molecules.
a. true b. false
In addition to several other factors, the overall risks of environmental chemicals depend on genetically determined
variations in the ____ involved in transport, metabolism, and excretion of these chemicals. a. proteins b. body’s oxygen levels c. body’s pH d. ribosomes e. disaccharides