The cell membrane is selectively permeable. Certain molecules can pass directly through the membrane, while others must pass through membrane proteins or cannot pass at all.
For each of the molecules listed in the table, place a check for whether they can be classified as polar, nonpolar, or charged. Then place a
check if they can pass directly through the membrane. If they are part of the structure of the membrane, place a check in that box.
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Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

2. how does the miller-urey experiment fall short of demonstrating that life can arise from inorganic molecules? explain. a. it doesn't show a leap between a collection of amino acids and a single-celled organism. b. it recreates the conditions that existed at the earth's beginning, but no molecules form as a result. c. it doesn't provide evidence of the formation of amino acids. d. it doesn't show how multicellular organisms developed from unicellular organisms

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?