When biologists use the terms fitness or fittest they are talking about __________.
a. how long an individual lives
b. passing genes on to the next generation
c. how healthy an individual is
d. how strong an individual is
Answer: b. passing genes on to the next generation
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The receptors for a group of peptide signaling molecules known as growth factors are typically ____
a. receptor tyrosine kinases b. cyclic AMP c. neurotransmitters d. G protein-linked receptors e. ligand-gated ion channels
Amyloplasts are organelles that store:a
fat. b. starch. c. protein. d. lipids. e. DNA.
In humans, how many different kinds of gametes can be produced due to independent assortment only?
A. 246 B. 234 C. 462 D. 232 E. 223
All bacteria and viruses are
A) antibodies. B) plasma cells. C) pathogens. D) causes of cancer. E) microbes.