Why are parents protective over there young in anykind of situation ?

In which direction is the pacific plate moving in relation to the north american plate?

What best explains the inability for life to exist in earth early atmosphere

The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes