Which of the following tissue types is specialized to conduct electrical signals?
A. nervous
B. muscular
C. epithelial
D. connective
E. Both nervous and epithelial tissue are correct
A. nervous
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In biology lab, your instructor informs you that carbon-14 dating will demonstrate the use of determining the age of a fossil. Using only this information, you estimate that the age of the fossil must be less than about years old.
A. 75,000 B. 1.3 billion C. 40,000 D. 100,000 E. 300,000
Methicillin inhibits cell wall production. Why does this make it an effective antibiotic?
a. The cell wall of human cells is not sensitive to methicillin b. Human cells have a plasma membrane in addition to the cell wall that allows them to survive in the presence of methicillin c. Human cells do not have cell walls d. All humans have a gene giving methicillin resistance e. Human cells and bacterial cells are completely different, so methicillin does not affect human cells
Describe alternation of generations. Include in your discussion the following terms: gametophyte,
sporophyte, diploid, haploid, dominant form, meiosis, and fertilization. What will be an ideal response?
During the Cambrian explosion approximately 535 to 525 million years ago,
A) all modern species of animals suddenly appeared. B) animals rapidly diversified in the oceans. C) a massive volcanic eruption nearly wiped out life on Earth. D) great forests produced peat layers that were later transformed into coal.