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Earlier discussion
2 older comments kept for context.
John Kenny Ade
Maize grain is monocotyledon there it has one seed leave or cotyledon while castor oil seed is a dicotyledon there it has two seed leave or cotyledons
Oluwaseun Adeyemi
A cotyledon is an embryonic leaf in seed-bearing plants, one or more of which are the first leaves to appear from a germinating seed. The components of castor oil seed and the maize grain are similar except for the number of cotyledons.