In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
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Question: Porcine insulin has _ different amino acid and bovine insulin has three different amino acids.

Answer: one


Question: Rheas are brownish instead of black like the ostrich and have _ toes instead of two.

Answer: three


Question: Mangroves are the common name for _ species of trees and shrubs found along warm water coasts.

Answer:
three