Answer:
The respiratory system and the circulatory.
Explanation:
The respiratory system brings in the oxygen and the circulatory system brings all of the oxygen through out the body.
Organisms are the biotic parts of an ecosystem.
Answer:
A.
Explanation:
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Differential reproduction means that some organisms in a population produce more offspring than others.
Differential reproduction refers to the difference between individuals in a population and how many offspring they are able to leave.The best adapted organisms to a given environment will leave more offspring than those who are not well adapted. Differential reproduction depends on the natural
Answer:
their are the characteristics of the similar term of physical feature
