How are traits removed from
the gene pool?

A. Organisms with less desirable traits do not reproduce

B. Organisms with less desirable traits reproduce the most

The model illustrates a process by which a substance is taken up by a cell

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.

What is the next step in muscle contraction after the actin changes shape? (apex)