Complete the sentences to describe selective breeding. Selective breeding is the process by which humans breed plants or animals to produce certain desirable

This process is also called

selection

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Intro

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.

Most enzyme names end in the

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic