Biology
Alveoli is related to which of the following system of human body?

Reproductive system
Respiratory system
Excretory system
Circulatory system

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Biology
Which statement describes decomposers?

Decomposers can produce their own source of energy and can sometimes act as primary producers
Decomposers are insignificant organisms in the ecosystem and can be absent in some ecosystems
All listed here
Decomposers are those organisms that recycle matter in the ecosystem

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