Ultraviolet A light penetrates deep into the skin and causes long-term skin damage, aging, and wrinkles.

Acid coagulation, rennet coagulation, and acid/heat coagulation are the three main ways to make:

People who are heterozygous for the lactase persistence allele can digest milk.

This domesticated vegetable is a member of the nightshade family. Through domestication, this vegetable loss its thorny spines and diversified into a wide range of colors. The American name of the vegetable comes for a common variety that resembles a white chicken egg. Name the vegetable.

Which variety of corn is the most widely grown in the United States?

The mutation for lactase persistence is the same in Europeans and Africans.

Goats were domesticated 11,000 years ago in western Asia. Domestic goats are descended from a still extant wild goat named:

About 2-3% of human babies and young children are allergic to cow’s milk. Most grow out of it but around 0.4% do not. What whey protein is the allergen?

Compared to chimpanzees, humans have ten times the density of eccrine sweat glands.

The rate of increase of carbon dioxide levels is 100 times higher than when the last Ice Age ended. We are not raising global carbon dioxide levels at a rate of 2.1 ppm/year.