Asap - 15 points
energy from the sun enters ecosystems through the transformation of light to chemical energy. this energy is available to different organisms based on the trophic level in which the organisms exist. which statement best describes the availability of energy for organisms in different trophic levels?
a. primary consumers have the least energy available.
b. available energy decreases as trophic levels increase.
c. available energy increases as trophic levels increase.
d. tertiary consumers have the most energy available.

Need will mark ! which features are created by groundwater erosion and deposition? check all that apply. a. stalagmitesb. sinkholesc. rillsd. stalactites e. gullies f. rivers

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

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?