Answer: A and D
Because photosynthesis takes in carbon dioxide and releases oxygen for people to breath
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Archaeopteryx, represents transitional fossil between reptilian and birds
Answer:
Theodor Schwann, said that all animals are made of cells.
Explanation:
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She should make observations next.
If she doesnt make observations, it would be difficult to form a hypothesis and design an experiment, the result will more likely to be inaccurate too.
