How do oceanographers use their measurements of the conductivity of
seawater?
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a. to estimate the amount of marine life in the water
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b. to avoid electric currents in the water
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c. to determine the water's temperature
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d. to calculate the water's salinity

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods. c. it shows that these organisms share the same habitat. d. it provides evidence that these organisms suffered a genetic mutation.