In 1766, Buffon suggested that certain fossil forms might be ancient versions of similar living species.
a. true
b. false
Ans: a. true
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The ____ is a system of vesicles that wraps around each A band and I band and stores ions that are
used in muscle contractions.
a. neuromuscular junction b. Golgi apparatus c. endolemma d. microvillus e. sarcoplasmic reticulum
The "poles" of a cell are its
a. centrosomes. b. centromeres. c. autosomes. d. centrioles. e. automeres.
Which of the following statements about the speed of impulse conduction in a neuron is true?
a. Longer axons can transmit impulses faster than shorter ones. b. Unmyelinated axons transmit impulses faster than myelinated ones. c. Shorter axons can transmit impulses faster than longer ones. d. Nerve impulses travel faster than the speed of light. e. Unmyelinated axons with larger diameters transmit impulses faster than ones with small diameters
Which of the following statements about DNA structure is false?
A: It is antiparallel. B: It has a uniform diameter. C: It is a double-stranded helix. D: The 3´end is phosphorylated. E: It is a right-handed helix.