The genetics of red hair appear to be associated with the melanocortin-1 receptor (MC1R), which is found on chromosome 16. Eighty percent of redheads have an MC1R gene variant.
I cannot find this source for this I'm sorry. I meant to add it but I lost the site
I'm not 100% sure, but I'd say the availability of vaccines and medicine.
Answer:
A. to remove waste
Explanation:
The purpose of reproduction is to create offspring. Offspring will naturally carry the characteristics of the parents. When offspring are born they create the next generation and keep a species alive. The excretory system removes waste.
They must be non-toxic ie not chemicals that could poison the customers because of the potential risk of contaminating things which can come into contact with the food like say cutting boards, dishes, utensils, pots, pans and any other similar items.
