Answer:
Mitochondria
Explanation:
Mitochondria is the site of cellular respiration which produces energy. A cell with few energy needs would therefore contain a small number of this organelle.
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Answer:
Oxygen
Explanation:
Reactants are used to make the products.
The cellular respiration formula is:
oxygen+glucose--> ATP + water +carbon dioxide
The reactants are oxygen and glucose. The products are ATP, water and carbon dioxide.
The gas reactant is oxygen.
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Answer:
Every element in the first period has 1 shell for its electrons. Every element in the second period has 2 shells for its electrons
