The phloem tissue of vascular plants is primarily composed of sieve elements and companion cells. these components allow the tissue to function in a very specialized way. sieve elements are arranged in long, cylindrical patterns that form a tube of cells. the cell membranes of these sieve elements allow molecules to pass between the cells of the tube. companion cells are responsible for taking up certain molecules made in the plant's leaves through active transport and moving them into the tubes made by sieve elements. based on the composition of phloem tissue, it is most likely used by the plant for

What is produced during the krebs cycle? co2, atp, nadh, and fadh2 pyruvate, co2, and atp atp, fadh2, and h2o h2o, adp, and nadh

Benito is doing research on the effects of florida's elevation on its climate. his notes include the following: 1. the average elevation of florida is 30 m above sea level. 2. the highest point in florida is britton hill, which is 105 m above sea level. 3. the change in temperature from 0 m to 1,000 m is 7 °c. what can benito conclude about the effects of florida's elevation on its climate? a.) florida typically experiences cold temperatures and temperature changes within a narrow range. b.) florida typically experiences cold temperatures and temperature changes within a broad range. c.) florida typically experiences warm temperatures and temperature changes within a narrow range. d.) florida typically experiences warm temperatures and temperature changes within a broad range.

What processes take place before the mature mrna exits the nucleus?