The defecation reflex involves two postive feedback loops. these loops are the stretch receptors in the rectal walls and the sacral parasympathetic system. Defecation reflex empties the rectum by peristaltic movements push fecal matter from the sigmoid colon into the rectum. Then this distension of the rectal walls stimulates stretch receptors which results in defecation.
Answer:
The important events of light reaction are (i) Excitation of chlorophyll molecule to emit a pair of electrons and use of their energy in the formation of ATP from ADP + Pi. This process is called photophosphorylation. Splitting of water molecule (a) (b) End products of light reaction are NADPH and ATP.
Answer:
A. The amount of atmospheric nitrogen would decrease, and nitrogen-fixing bacteria would die off.
Explanation:
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If a new beetle was found you would know if it was a invasive species depending on where you found it. A invasive species may be found on a eaten plant or a eaten tree. Although you would have to find a few to be sure.