Flatworms are

A. Parasitic

B. Free Living

C. both A and B

D. none of the above

Which cells in the leaf are green?

Which type of solution will cause cells to swell, or even to burst? (a) Isotonic solution (b) Hypotonic solution (c) Hypertonic solution (d) Osmotic solution

Where does energy come from in heterotrophs

What serves as a long term storage area for water or nutrients?

In tropical climates, where strong insolation makes temperatures high, all that is needed for intense daily convectional storms is: in

How long does gunpowder residue remain on a shooter's hands? A few hours About 24 hours A few days About a week

Why are some planets made of frozen gases and others solid?

The skin is the primary organ of the

What is true for urochordates? A. The notochord is present throughout their lives. B. The notochord is present only in the larval stage; it is absent in adults. C. The notochord is present in the larval stage; it becomes vertebrae in adults.

What term is used to refer to a characteristic of a population in statistics?