How do researchers most often investigate the

role of the gut microbiome?

A. They use adult human subjects.

B. They use clinically depressed patients.

C. They use germ-free mice.

D. They use bacteria models.

The term for purity, or brilliance, or saturation of a color is:

What structures do plants need that animals do not need? Why?

Mike wrote the characteristics of two types of galaxies as shown below. Type A: forms a perfect sphere or smooth flat and oval Type B: has a large flat in core Which statement is correct? Type A is an elliptical galaxy and type-b is a lens Galaxy.

Why might lion codes not need to be born knowing how to hunt

Do fossils provide evidence of organisms that lived in the past

3. In which process do substances have to be in direct contact when heat moves from areas of more heat to areas of less heat?

While on an archaeology expedition, you unearth a skeleton with the following characteristics: four long, slender finger bones and a smaller opposable thumb bone, long arm bones, fingernails, and eye sockets close together on a skull.

Describe respiration

Which of the following is a property of minerals? a. Age b. Odor c. Hardness d. Size

What created the abundant agriculture in the Napa Valley of California? A:oceanic-continental convergence B: an earthquake C: a tsunami D:continental-continental convergence