Question

Which of the following best describes the matter present in an ecosystem?

1.New matter is continuously generated by an ecosystem in a process known as photosynthesis.

2.The waste materials generated by one organism are often reused by other organisms.

3.When an organism reproduces, new matter is added to its ecosystem.

4.The total amount of matter in an ecosystem is constantly decreasing due to the process of decomposition.

Answer 1

Its is the second one. The waste materials generated by one organism are often reused by other organisms.Mass, or matter, is conserved in all physical and chemical changes. Matter is not created or destroyed within ecosystems, it only undergoes physical or chemical chagnes.

One example of this process is that the waste materials generated by one organism are often reused by other organisms as food or nutrients.