The Earth's Mass is what directly influences its gravitational pull. The gravity produced by the earths mass keeps people grounded on earth and the moon in orbital rotation by pulling to the center of mass, the Earth's core.
When bacteria decompose, they leave behind nutrients. These nutrient then filter unto the roots of the plants via the water that it sucks up. A loss in certain nutrients could be the death of this plant.
Answer:
Instead of a brain, echinoderms have a ring of nerves located around their mouth area that governs their nervous responses. This ring coordinates their motion, their eating, basically anything that requires nerve control.
Explanation:
I do believe that it is C. crossing over :) I hope that is correct, it seems like the only plausible answer.
