Which of these statements about water is true?
select one: a. its atoms share electrons equally. b. it can dissolve all known substances. c. its molecules are farther apart in the solid state than in the liquid state. d. it has a lower specific heat than nearly all known metals. next

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

Write the balanced chemical equation forphotosynthesis.

Which of the following is the sl unit used to measure temperature a. kilogram b. liter c. meter d. kelvin