Answer: Pulmonary aortic valve
Explanation:
Answer:
Valence electrons, or the electrons that are farthest from the nucleus.
Protist are eukaryotic organisms that cannot be classified as a plant animal fungus. They are mostly unicellular, but some like algae, are multicellular. Kelp, or “seaweed” is a large multicellular protist that provides food, shelter, and oxygen for numerous underwater ecosystems.
The important thing to identify the degrees of lightness to darkness in each level.
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