The earliest crust was probably ____
a. rich in precious metals
b. composed of felsic igneous rock
c. composed of ultramafic rock
d. very similar to the one of today
e. composed of basaltic rock
c
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In the water column, where does respiration exceed photosynthesis?
a. Below the compensation depth b. At the compensation depth c. At the bottom of the euphotic zone d. Above the compensation depth e. At the surface
Why is it easier for the body to excrete a polar molecule than it is to excrete a nonpolar molecule? What chemistry does the body use to get rid of molecules it no longer needs?
A. Polarity of the molecules has nothing to do with the ease of excretion. However, the body does metabolize and excrete smaller molecules more easily and passes them out through the colon. B. It is easier for the body to excrete nonpolar molecules because they dissolve in the oils of the skin and are washed away when we bathe. C. Polar and nonpolar molecules are excreted equally easily. The body is well adapted to deal with both forms of molecules via its metabolic processes. D. Polar molecules are easier to excrete because of their greater solubility in water. Upon dissolving in water, they can be excreted through urine.
Old drink bottles that are collected, washed, and refilled are an example of ____________________
Fill in the blanks with correct word
Due to the nature of the movement of a wave, which wave produces the most earthquake damage?
A) P-waves B) S-waves C) body waves D) surface waves