Convergent evolution can occur when two different species adapt similarly due to their habitat and environment.
The three major islands are Japan, Indonesia and New Zealand.
Answer: the correct answer is d. all of the above must happen for defecation to occur.
Explanation:
In response to the distention of the rectal wall, the receptors send sensory nerve impulses to the sacral spinal cord. Motor impulses from the cord travel along parasympathetic nerves back to the descending colon, sigmoid colon, rectum, and anus. The resulting contraction of the longitudinal rectal muscles shortens the rectum, thereby increasing the pressure within it. This then opens the internal sphincter.
The increase in the high fiber diet reduces the risk of colon cancer is suggested by the researchers. The effect of high fiber dietary intake add bulk to the digestive system. It also reduces the time required by the food to travel from the colon. Our food often contains some carcinogenic contents, so the interaction of such carcinogens may also be reduced due to the high fiber diet and also reduces the risk of intestinal tract. The bacteria in the lower intestine breaks the fibers into butyrate, which inhibits the growth of tumors of the colon and rectum.
