Biology students used raw eggs in an experiment on tonicity and osmosis. the students put their eggs into vinegar to remove the shells. the vinegar was used to remove the shell form the raw egg. what other effect(s) did the vinegar have on the egg? a) the vinegar solution was hypotonic, causing the egg to gain mass. b) the vinegar solution was hypotonic, causing the egg to lose mass. c) the vinegar solution was hypertonic, causing the egg to gain mass. d) the vinegar solution was isotonic to the egg so the mass remained constant.

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

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?

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups