An investigator is interested in the etiology of neonatal jaundice. to study this condition, he selected 100 children who were diagnosed with this condition and 100 children born in the same time period and in the same hospital who did not have a diagnosis of neonatal jaundice. he then reviewed the obstetrical and delivery records of their mothers to determine various prenatal and perinatal exposures. this is an example of a(n)

Case control.

Explanation:

Case control may be defined as a a type of the epidemiological observational type of study in which the subjects are not random. The exposure status cannot be examined by the researcher.

Two groups are used in these studies - exposed and unexposed group. Here, both the affected and unaffected children are available. One group can be considered as case or exposed group while the other group can be considered as unexposed or control group.

Thus, the answer is case control.

answer: every other day

explanation: because you don't want to over work your body and especially if your just starting to work out.

answer:

i don't believe the ocean is purple, but it might once have been:

as for the sky, according to nasa:

"sunlight reaches earth's atmosphere and is scattered in all directions by all the gases and particles in the air. blue light is scattered more than the other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time."