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.

What is the basic definition of a eukaryotic and prokaryotic cell?

Sugar molecules can enter cells through the process of

What are the two main ways that minerals are classified? 1. chemical makeup and how they can be used 2. chemical makeup and crystal lattice structure 3. how they can be used and how rare they are 4.

Which of the following is not currently polluting Earth's water? A) trash B) fertilizer C) sewage D) carbon monoxide

Which form from heat and pressure? A. igneous rocks only B. metamorphic rocks only C. sedimentary rocks only D. crystalline rocks only

Describe two negative effects that water pollution can have on the environment. Explain one way water pollution can be reduced.

Some properties of diamond are different from those of graphite because diamond

Lipase is an enzyme (a type of protein) that breaks down fats. Which of the following statements about lipase are true? Select all that apply. Which of the following statements about lipase are true? Select all that apply.

Sammi was born 3 days ago and has lost 3 percent of her body weight. should her parents be concerned?

Ice wedging occurs because a given amount of ice has a volume (greater than, less than, the same as) an equal amount of water