Agroup of students designed an experiment to determine the effect of compost on the germination and growth of plants. the students set up experimental plots by mixing different ratios of soil and compost. they planted 20 pea and 20 melon seeds in each plot and watered each plot regularly. the students recorded the number of seeds that germinated, and as the plants grew, they recorded plant length, number and size of leaves, and g

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

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?

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?