Na20

How many atoms of each element are in this compound?

A) 2 sodium atoms and 1 oxygen atom

B) 2 sodium atoms and 2 oxygen atoms

C) 1 sodium atoms and 1 oxygen atoms

D 1 sodium atom and 2 oxygen atoms

Observing animal tracks is an example of observation, which is used to estimate population size. A. mark and recapture B. indirect C. sampling D. direct

Describe the niche of a giraffe

What type of plankton is the major portion of the baleen whale's diet?

What are the thin fibers of the human nervous system that send messages between different parts of the body? A. ligaments B. tendons C. nerves D. spinal cord

The frogs heart is different than the human heart - describe the differences you saw

Metamorphic rock with A handed appearance due to the alignment of minerals are

What results when the combined effect of two different drugs taken together exceeds the sum of the individual drugs administered alone?

Animal lays eggs with a tough leathery watertight shell

Why is DNA antiparallel? It has double strands complementing each other. The bases in one strand pair with the other bases in the complementary strand. It has a ladder shape. Its double strands run in opposite directions.

Which of these is a solution, where the solute and solvent are in the gas phase? A) air B) ozone C) brass D) carbon dioxide