What do veins have that arteries and capillaries do not?

A. Valves

B. Skin cells

C. Extra thick

D. Chambers

In which direction is water moved by osmosis across a selectively permeable membrane? A. The water moves from the higher concentration of solutes to the lower concentration of solutes. B.

Explain how genetic engineering can be vital to sustainable agriculture practices

I'm which situation will two objects each traveling with a speed of 2 m/s have the greatest relative motion?

What do bone marrow and the epidermis have in common? A. They are both sites of new cell formation. B. They both contain structures that assist the body in cooling down if overheating occurs. C.

What organelle is composed of flattened membranous sacs that are involved in the 'packaging' and 'shipping' of proteins? (write out entire name)

Why nitrogen must cycle through an ecosystem

How many cell types are present in your groups set of organisms?

Which of the following is the functional unit of a myofibril? a. sarcomere b. myofilament c. sarcolemma d. endomysium

20. In certain species of summer squash, fruit color is determined by two interacting genes. A dominant allele, W, determines white color, and a recessive allele (w) allows the fruit to be colored.

When you look out the window, you can see constantly moving air. air is cycled in order to reach equilibrium. B) since these change the density of air and we know the air flows from the region of high density to the region of low density.