How long did it take in the history of life on Earth to go from the first prokaryotic cells to the first eukaryotic cells?
A. 1,000 years
B. 1 million years
C. 100,000 years
D. Over a billion years
Answer: D
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How many different chromosomal combinations can occur as a result of meiosis?
a. 8,388,608 b. 3,450,000 c. 5,450,750 d. 2,000,000 e. 6,600,980
Would you expect motor units to vary in size? If so, which of these structures would probably have the largest ones?
A) No; all motor units are the same size. B) Yes; a motor unit in the thigh to control leg movements would be the largest one. C) Yes; a motor unit that controls eye movements would be the largest one. D) Yes; a motor unit that controls hand movements would be the largest one.
Which of the following statements regarding dynamic instability is false?
(a) Each microtubule filament grows and shrinks independently of its neighbors. (b) The GTP cap helps protect a growing microtubule from depolymerization. (c) GTP hydrolysis by the tubulin dimer promotes microtubule shrinking. (d) The newly freed tubulin dimers from a shrinking microtubule can be immediately captured by growing microtubules and added to their plus end.
What number is the Flagellum?
What will be an ideal response?