How do scientists know that some mountains were once at the bottom of an ocean?

What is the cause of malaria?

How can the rate of an infectious disease be drastically reduced?

What is involved in creating genetically modified bacteria?

In a food pyramid, which best explains why the number of organisms decreases from one trophic level to the next?

What process is responsible for the extinction of most species of plants and animals that have lived on Earth?

What would indicate that a series of fossils represent the evolution of the horse?

Which would enable strawberries to survive a hard freeze?

Which food provides the most energy for the body in the shortest amount of time?

Why is protein an important part of a healthy diet?

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