Which colors of light are most effective for photosynthesis. Explain why.

Ecosystems include food webs that show predation and prey interactions among organisms. But ecosystems have many more relationships beyond predator-prey. What do you think these could be? Can you think of some examples?

What conclusions can be drawn about an insect stuck in amber?

How can we predict which elements are stable under natural conditions and which elements tend to undergo chemical reactions

How climate and seasonal variations affect Earth's varying biomes

If your blood sugar is too high your body need (a) insulin (b) glucagon

In a classroom system, the students produce an output of information on tests and homework. This information becomes an input for the grading part of the system. Which statement about the output of the students is true? A.

In two or more complete sentences describe how a dam placed in a river can act as both a constructive and destructive force.

When enough experimental data support a hypothesis, the hypothesis becomes a what

Which part of the central nervous system is used to serve as the main communications link between the body and the brain

Examine the following diagram. Place the labeled layers in order from oldest to youngest.