Chloroplasts are found in a leaf's a) lower epidermis b) upper epidermis c) palisade layer d) spongy layer

The chloroplasts are found in a leaf's palisade layer as it is near the top of the leaf. Therefore, your answer would be C.

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An ecosystem is in a certain area and includes living and non living plus there is weather conditions and a biome is a large amount of area with similar climate.so ecosystem is based on weather and biome is based on the average climate