If there are 20,000 Kcals available at the first trophic level, how many Kcals are available when we arrive at the Level 4? Level 5? Write the amount of energy available at levels 4 and 5.

Which phrase best describes surface currents? 1. up-and-down ocean movement caused by wind 2. waves that hit the shore at an angle and transport sand 3. streams of warm water flowing through the ocean and caused by wind 4. waves that approach the shore and cause their crests to fall into their troughs

Some substances but not other can cross the (blank) membrane of a cell

Veronica and her little sister, monique, are playing on a seesaw. if veronica weighs 75 pounds, and monique weighs 60 pounds, which statement is true?