Why do tropical rain forests have a large variety of plants and animals

How many people doez obesity effects in the USA?

Dams are used to produce hydroelectric power. Which of these best describes the impact of a dam on the environment? a. It causes air pollution. b. It reduces the level of groundwater. c. It causes changes in the river ecosystem. d.

Location A receives the sun's rays at an angle. Location B receives the sun's rays head on. Which statement is most likely true? Both locations are at the poles. Both locations are at the equator.

Explain why the force of muscle twitch can vary?

What's a classification system?

How does a mutation in dna cause a disease that affects multiple organs?

Dylan is on a strict vegan diet. He doesn't consume meat, fish, eggs, or dairy products. Which nutrient is difficult to obtain naturally from a vegan diet

Determine what each letter represents in the Punnett square. Letters A and B represent the genotypes of the

What vessel returns filtered blood to the inferior vena cava

Which of these is true for bacteria because they are prokaryotic cells a - they can destroy neutrophils b - they are much smaller than lymphocytes c - they can invade macrophages d - they are much larger than killer T cells