Which is one way that skin protect the body from infection?
a. skin keeps germs out of the body.
b. skin keeps mucus out of the body.
c. skin directs sensory messages.
d. skin produces complement proteins.

The correct answer is option A.

Explanation:

The skin refers to the largest organ of the body and is the most essential barrier against the infections. It is the first line of defense in safeguarding the internal tissues from the harmful germs. In case, when the skin gets damaged due to an injury, it becomes easier for the germs to get within the body and leads to infection.  

The skin can also get damaged due to cancer treatments like radiation therapy or surgery, and some other procedures like administering catheters, all these things can make it easy for the germs to get in. However, if the germs are able to cross through the first line of defense, the work of protecting the body from the infections get shifts to the immune system.  

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.