The letter “B” in the above figure represents
a. the root nodules.
b. the primary root.
c. the primary leaf.
d. the cotyledons.
e. none of these.
Answer: b
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Which of the following are considered to be fossils?
A) Footprints or other impressions preserved in stone B) Mineralized bones C) Animals frozen in ice or preserved in amber D) All of these
What is occurring when a transport protein uses energy to pump a solute against its gradient across a cell membrane?
a. osmosis b. passive diffusion c. facilitated diffusion d. turgor e. active transport
Aspergillus and Penicillium are related because both
a. produce antibiotics. b. reproduce sexually using ascospores. c. are club fungi. d. parasitize human mucous membranes. e. lack known sexual stages.
In comparing mitosis and meiosis, which of the following statements is true?
a. Meiosis I is more like mitosis than is meiosis II. b. Both processes result in four cells. c. Synapsis occurs in both. d. Chromatids are present only in mitosis. e. Meiosis II resembles mitosis.