One main difference between a pine tree and an arctic fox is..? A. The cells of the pine tree have a cell wall, and the cells of the arctic fox do not
B. The arctic fox is a producer while the pine tree is a consumer
C. The pine tree is abiotic while the arctic fox is biotic.
D. The pine tree is not adapted to survive in the cold weather

Please help!

When organisms are classified ,they are given a two part name

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

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?