Growth of long bones
a. follows the cartilage model.
b. occurs at both ends first, then in the middle.
c. is characterized by calcified cartilage replacing bone tissue.
d. is characterized by the absence of cartilage at both ends of the shaft.
e. is also called bone remodeling.
A
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A particle that consists of nucleic acids surrounded by protein and requires a host organism to replicate is
A. a prokaryote B. a viroid C. a plasmid D. a virus E. a prion
Which of the following statements is (are) true?
a. All action potentials transmitted by the same neuron are alike. b. The brain assesses a stimulus in part by which neuron pathways are active. c. Different neurons convey different information by transmitting impulses to different areas of the brain. d. A strong stimulus recruits more receptors than does a weak stimulus. e. All of these are true.
Which of the following is NOT an example of a gymnosperm?
a. conifers b. ginkgos c. ferns d. gnetophytes e. cycads
If an enzyme catalyzes the reaction A + B ? C, then
A. the enzyme could also convert A + B to another molecule D. B. the enzyme will also catalyze the reaction C ? A + B C. the enzyme undergoes a conformational change when bound to A and B. D. the enzyme energizes A and B to make them more reactive. E. the active site of the enzyme binds C more tightly than A and B.