A molecule composed of carbon and hydrogen is a compound
Indicate whether the statement is true or false
TRUE
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Unlike plants, fungi, and bacteria, animal cells cannot resist volume increases in hypotonic environments. This is
because unlike those other organisms, animal cells ____.
a. do not have central vacuoles b. do not have cell walls c. do not have pumps that can actively pump out excess fluid d. are smaller than those other cells and thus cannot handle large increases in volume e. have relatively more solutes
By the mid-1980s, spring ozone thinning over Antarctica was so pronounced that people were referring to the lowestozone
region as a(n) __________. Fill in the blank(s) with the appropriate word(s).
Global climate change is likely to increase the rate of extinction worldwide. What pollutant is most implicated in this problem?
A) nitrous oxides B) carbon dioxide C) sulfur dioxides D) chlorofluorocarbons
How does a prokaryotic cell differ from a eukaryotic cell?
a. A prokaryotic cell has no membrane-enclosed organelles. b. A prokaryotic cell has a plasma membrane. c. A prokaryotic cell contains organelles. d. A prokaryotic cell has a nucleus. e. A prokaryotic cell has DNA.