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Nadya [2.5K]
3 years ago
9

Which group of animals has a closed circulatory system featuring a single circuit and two heart chambers?

Biology
1 answer:
kykrilka [37]3 years ago
5 0

Answer:

Fish

Explanation:

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Therefore if a pure culture contains have both red and purple cocci that it can be concluded that the gram stating was not done properly like too much destaining was done or too much safranin was used or maybe the culture is too old so that cell wall of some bacteria degrades.

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