Bacteria are an important part of the digestive system. Select all statements that are true about the role bacteria play in digestion. A. Bacteria help with nutrient absorption.
B. Bacteria help with vitamin production.
C. Bacteria fill spaces in the digestive system so that bad bacteria cannot live there.
D. We can find both good and bad bacteria in the digestive system.​

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

Me . based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

Describe two recent or ongoing space missions.