Maria wanted to rid her home of cockroaches. she applied pesticide and after 1 day she found many dead cockroaches. days later, she observed a few live cockroaches. she reapplied the pesticide, but she continued to see some live cockroaches. what best explains the continuing presence of live cockroaches

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.

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

This rapid change in species that rarely leaves behind fossil evidence is referred to as