In matter flows from one trophic level to another, and
elements are recycled within and among ecosystems.
1. biogeochemical
cycles
2. nutrients
3. nitrogen
fixation
4. denitrification
5. limiting nutrient

Which animal is a producer in this ecosystem

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b. a light particle

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!