Select the pair that correctly represents a non-endospermic monocot seed and an endospermic dicot seed, respectively.

Step-by-step solution

Generally, monocotyledonous seeds are endospermic (albuminous) and dicotyledonous seeds are non-endospermic (exalbuminous). However, orchids are an exception among monocots as they have non-endospermic seeds. Castor is an exception among dicots as it has endospermic seeds. Wheat and maize are typical endospermic monocots, while gram and pea are typical non-endospermic dicots. Therefore, the correct pair representing a non-endospermic monocot and an endospermic dicot respectively is Orchid and Castor. Answer: Orchid