What is the main energy source that drives global climate?
a.
solar
b.
wind
c.
mechanical
d.
heat

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

Nucleic acid certain protein cell membranes certain carbohydrates