Which of the following is the densest layer of solid earth?

A. Crust

B. Atmosphere

C. Core

D. Mantle

Explain how human impact on the environment has changed over time.

How is ammonia produced by bacteria in the soil

In a plant, the leaves allow gases to be exchanged. Which structure in the human body is similar in function to leaves? A. the pancreas B. the urethra C. the alveoli D. the nerves

The leaves of a plant appear to be green because light waves are A) reflected. B) absorbed. C) both absorbed and reflected. D) neither absorbed or reflected.

The blood vessel that carries blood into the glomerulus is called the: afferent arteriole O vasa recta peritubular capillary O efferent arteriole arcuate artery interlobular artery

Disorder affecting one or more nerves where they exit the spine

What senses is associated with the temporal lobe?

What are 2 ways nitrogen becomes usable to plants, humans and animals?

What factor has the greatest effect on species diversity

A scientist inserts a radioactively labeled DNA molecule into a bacterium. The bacterium replicates this DNA molecule and distributes one daughter molecule (double helix) to each of two daughter cells.