Darwin often used the phrase "" to suggest that species must have descended from preexisting species and that change took place over time. on the origin of species survival of the fittest descent with modification differential reproduction

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change.

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.

Two critical interventions to turn around the opioid crises are: