What caused the sea level change allowing arctic hunters into the americas

Share 3-5 different reasons people may eat food beyond the need for nutrients. For example, you could describe the role of food in our emotional lives, social lives, holidays and other family occasions, and so on (read the last paragraph for some

What is used to trace men's genetics? Why can this be used?

Proteins are called the building blocks. Theyre needed for growth and development and to repair the normal wear and tear of the body. The body needs to digest proteins to make them available to fulfill these functions.

How do scientist work

Two parents of normal phenotype have a son with an autosomal recessive linked genetic disorder. What is the most likely cause of this? a. Both parents must be heterozygous for the disorder, or carriers. b.

Who suggested the sun and the moon orbited earth, and the rest of the planets orbited the sun

Which of the following pairs are isotopes of the same element

A farmer cut a branch from his favorite, mature fruit tree, planted it in the soil, and it grew to be a new tree. The farmer's method of growing a new plant is a type of A) pollination. B) seed production. C) sexual reproduction.

is the net movement of molecules or ions from a region of higher concentration to a region of lower concentration brought about by the energy of the molecules

Which is closer to the Earth? the Sun or the outer planets?