PLEASE HELP TAKING TEST NOW NO LINKS PLEASE A student is conducting research on the impact of humans on whooping crane populations in the North America. Which statement best supports the student's claim that animals have been positively impacted by human intervention? (1 point)
In the early 1900s, the U. S. and Canada jointly signed a migratory bird treaty.
O Although the hunting of whooping cranes was criminalized, their numbers continued to decline.
O Captive-bred whooping cranes have been introduced to natural environments.
In the 1800s, North America was home to over 1,000 whooping cranes.

The graph shows the solubility of several different salts in water, across a range of temperatures. according to the graph, which salt can dissolve at a concentration of about 60 g/100 cm3 of water at 40 degrees celsius?

Nucleic acid certain protein cell membranes certain carbohydrates

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?