Explain the relationship between the environment, variation, and selection. Changing can cause certain traits to be favored through . This can lead to changes in .

Abnormal softening of a gland is known as

What in scientific term why the salty popcorn causes this thirst

1. fold your hands together so your thumbs cross over ,and look at your thumbs. which thumb feels most "comfortable" on top is actually controlled by a gene. the left thumb folding over the right thumb is a domi