Which statement best summarizes what Garrett Hardin called the "tragedy of the commons"? Nonrenewable resources may be economically depleted before they are fully depleted.
Resources become depleted if they are used up more quickly than they can be replaced.
The most readily available resources are in lower demand than rarer resources.
The combined effect of many people using a resource degrades or depletes the resource.

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.

As soon as i live in alabama and i have question to me with a report. or rather a statement. the statement i need with: discuss the influence of cost and availability on your states (alabama) statistics. i really need to complete this. so anything will ! 20 points are up for grabs to the most !

What is the meaning of exocytosis ?