Hominin fossil footprints that are obviously bipedal date to about ________ years ago
A) 50,000
B) 100,000
C) 3.6 million
D) 12 million
Answer: C
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Striated muscles appear striated or banded under a microscope. Striated muscle fibers include (Choose all correct answer options):
A. skeletal muscle B. muscles of cnidarians C. smooth muscle cells D. cardiac muscle cells
In eukaryotic cells, the cell cycle is divided into two main phases in which the cell spends most of its time and metabolic energy. These two phases are
A. interphase and mitosis. B. mitosis and meiosis. C. interphase and cytokinesis. D. interphase and binary fission. E. mitosis and cytokinesis.
Which of the following chromosomal rearrangements usually results in normal meiosis?
A) translocation heterozygote B) translocation homozygote C) paracentric inversion heterozygote D) pericentric inversion heterozygote
How does the early development of the mouse differ from that of Caenorhabditis?
a. Embryonic mouse cells commit to their ultimate fate earlier than do the cells of Caenorhabditis. b. Early development of a mouse is regulative, while early development of Caenorhabditis is not. c. Mouse cells require higher concentrations of nutrients than do the cells of Caenorhabditis. d. Embryonic mouse cells differentiate much later than the cells of Caenorhabditis. e. Embryonic development in the mouse is controlled by transcription factors, while Caenorhabditis is not.