How can natural selection affect a predator-prey relationship in an ecosystem? choose all answers that are correct. a. predator and prey populations are both affected by natural selection. b. changes in one population do not affect the other population. c. only select generations are affected by natural selection over time. d. traits that allow for survival and reproduction at a greater rate than those without the trait will be selected by nature.

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.

Which is the graph of the piecewise function f(x)? f(x) = image for option 1 image for option 2 image for option 3 image for option 4

Moving down the ramp from 6 meters to