Some steps in mitosis are shown below in the incorrect order: step a: chromosomes line up at the center of the cell step b: the cell membrane squeezes the middle of the cell to form two identical daughter cells step c: the sister chromatids are pulled apart step d: the chromosomes pair up which of the following sequences puts the steps in the correct order? look at my profile there is more questions no one has answered pls 10+ points

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

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?

The united states uses which source of energy to produce almost 40 percent of its electricity