You're right! It is the first one, energy and matter within living organisms
Answer:
the last answer seems to be correct
Explanation:
Answer:
Explain in your own words an atom and an element.
Explanation:
A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing just one proton and one electron.
Answer:
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Explanation:
the autotrophs in the given series are sunflower and algae
tricuspid valve is located between the right atrium and ventricle
