At an initial examination in Oxford, Mass., migraine headache was found in 5 of 1,000 men aged 30 to 35 years and in 10 of 1,000
women aged 30 to 35 years. The inference that women have a two times greater risk of developing migraine headache than do men in this age group is:___________a. Correctb. Incorrect, because a ratio has been used to compare male and female ratesc. Incorrect, because of failure to recognize the effect of age in the two groupsd. Incorrect, because no data for a comparison or control group are givene. Incorrect, because of failure to distinguish between incidence and prevalence
Headache is a migraine which influences one portion of the head which endures from 2-72 hours.
It influences a larger number of young male than young females before puberty and more young females then young male after puberty. The normal side effects incorporate retching, sickness, affect ability to light, stable and smell.
Prevalence is characterized as the quantity of influenced people present in a populaces at a particular time partitioned by the quantity of people in the populace around then.
Answer: When the plant has enough water in its cells the guard cells swell up and open the stomata. When the plant isn't getting enough water the guard cells can't swell and the stomata stay closed, so the plant doen's lose water. But if the stomata are closed photosynthesis can't happen and eventually the plant might starve.
