Which of these best describes Earth's crust?

A - Inner layer consisting of two parts

B-Middle layer, density increases with depth

C-Top portion called asthenosphere, thickest layer

D-Thinnest under the oceans and thickest under continents

Synthesis of one protein cannot take place without the presence of another protein." Is this statement true or false and why

Which states of matter have particles that move independently of one another with very little attraction? a. gas and plasma b. liquid and gas c. solid, liquid, and gas d. liquid, gas and plasma

What factor can cause to two populations to become reproductively isolated?

What does it mean for the human and the wolf to walk separate but parallel path

What is the smallest unit of many compounds?

Without animals can plants survive?

A molecule is two or more atoms bonded together. A hydrogen gas molecule (H2) is two hydrogen atoms bonded together. Gina is building a model of a hydrogen molecule with balls and sticks. Which of these is the best model for her to build?

Which plant below has a woody stem? A. grass B. tomato plant C. tulip D. pine tree

Can mutations in DNA cause changes in an organism? Explain.

Which organism eat the Flower