Starfish are found in oceans around the world. On the undersides of their arms they have small structures called "tube feet", which are very sensitive to chemicals in the water, helping them to detect food. When they detect food, they move their arms to travel in the right direction. Each of their arms contain two gonads, which release eggs or sperms into the water. a) Suggest and Explain three pieces of evidence from the passage that show starfish are living organisms.

1. Living organisms feed.

2. Living organisms move(locomotion)

3. Living organisms reproduce

Explanation:

And in the above passage, all the above were demonstrated.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

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