Use the steps below to determine the correct order of the path that blood takes as it flows through the body.

a. the right side of the heart pumps blood from the heart to the lungs.

b. the oxygenated blood flows to the left side of the heart, where the blood is pumped to the rest of the body.

c. deoxygenated blood returns from the body and enters the right side of the heart, where the blood is ready for another trip back to the lungs.

d. in the lungs, carbon dioxide leaves the blood, and oxygen is absorbed in.

a, d, b, c

a, c, b, d

a, b, c, d

a, d, c, b

What causes the phospholipids to organize themselves the way they do

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails. b. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. c. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails have other functions,because prokaryotes don't have nuclei.

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.