Order of DNA replication/ Topoisomerase removes stress on the DNA strand above the replication fork. DNA replicates in the S phase of the cell cycle before mitosis begins. DNA polymerase III attaches free-floating complementary nucleotides in small sections of the lagging strand, callled Okazaki fragments. Helicase unwinds the DNA strand at the replication fork. DNA ligase stitches the Okazaki fragments together to make a complete strand of DNA. DNA polymerase III attaches free-floating nucleotides in the 3' to the 5' direction along the leading strand. Helicase rewinds the DNA at the replication fork. RNA primase creates an RNA primer on the lagging strand, starting at the 3' end.

Cis correct i think

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.