In all cells a gene encodes for
A) a protein (via mRNA).
B) a tRNA.
C) an rRNA.
D) a protein, tRNA, or rRNA depending on the specific gene.
Answer: D
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The movement of both oxygen and carbon dioxide in the body is accomplished by
a. exocytosis and endocytosis. b. bulk flow. c. osmosis. d. diffusion. e. facilitated diffusion.
When Mendel crossed tall (Tt) plants with tall (Tt) plants the offspring
a) did not grow and reproduce. b) were always short. c) were always tall. d) were always medium height. e) were mostly tall individuals and a few short individuals.
Tumor blood vessels are ____ with an irregular shape.
a. dilated b. stretched c. shaped d. none of the above
Early mammals differed from reptiles in many respects, including:
A) feeding their young milk. B) the number of legs used for walking. C) eating other organisms for food. D) internal versus external fertilization.