I think it’s D
Explanation:
Primary consumers are herbivores, feeding on plants. Caterpillars, insects, grasshoppers, termites and hummingbirds are all examples of primary consumers because they only eat autotrophs (plants). There are certain primary consumers that are called specialists because they only eat one type of producers.
Yes it is true, both the hair and nail plate are composed of keratin
The purpose of cutting a frog heart it too relate how the heart structure is. It is just a small scale of the human heart.
Answer: b
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