Lactose intolerance:
a. results from the lack of lactase
b. can be influenced by the environment
c. has a genetic basis
d. all of these
e. is a good example of biocultural evolution

The answer is A: results from the lack of lactase

Explanation:

Lactose intolerance is caused by the lack of the enzyme lactase, necessary for digestion. Their symptoms usually occur 30 minutes after eating the food with a feeling of nausea, bloating and vomiting. It can occur from the first months of life as well as in adulthood.

answer: the answer is d.

explanation: this is because when you exercise you make your muscle produce a certain liquid, that does not evaporate it.   also when you exercise you do not reduce muscle fiber.   and it does not really control your twitch that much.