The answer is D). Fighting disease
Scratching insect bites can lead to infection, a superficial crusty infection of the skin.The scratching cause the skin around the bitten area to break open which causes infection. Example of insect that bites are mosquito, midge and flea among others.
Answer:
Why can a female only pass on an X chromosome to offspring?
It is an established fact that female has XX chromosomes while male has XY chromosomes, during fertilization both male and female donate one of the pairs to form a pair of allele for the offspring. The female donate an X chromosome since the two chromosomes in her possession is XX while the male donate either of the X or Y chromosome
Explanation:
