What must be done to be certain that a chemical change has taken place?
a. check for the prod...
Biology, 26.08.2019 11:00, anaroles04
What must be done to be certain that a chemical change has taken place?
a. check for the production of bubbles before and after the change.
b. demonstrate that a release of energy occurred after the change.
c. check the composition of the sample before and after the change.
d. demonstrate that energy was absorbed by the reactants after the change.
Answers: 2
Biology, 21.06.2019 18:50, jimmyjimjim
The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is the most likely effect on the ecosystem? a-an increase in biodiversity. b-an increase in immigration to the area. c-a decrease in available water. d-a decrease in plant growth.
Answers: 2
Biology, 21.06.2019 21:00, tiffanibell71
~~16. while watching a special on animals, brianna discovers that hares tend to lose heat through their ears. based on this and what is known about surface-to-volume ratios, propose an explanation as to why hares that live in hot climates (such as the desert) have large, extended ears
Answers: 1
Biology, 22.06.2019 02:50, mccay5016987
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?
Answers: 1
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