Answer:
The wave like motion of a tube.. generally oesophagus due to which, food goes down
Explanation:
peristalsis have alternative contraction and relaxation movements
Answer:
this is an extremely broad question. they do it through a problem, hypothesis, experiment, analysis, then conclusion.
Producers are found at the bottom of the energy pyramid because they take in the sun's energy and convert it to large amounts of plant energy.Therefore, animals on the next level will gain energy from eating the plants directly and then the energy will continue to pass on from level to level as the food chain continues.
Magnesium would need 6 electrons to fill its outer shell.
