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Which one of the following organisms is correctly matched with its three characteristics?
A
Maize : $C_3$ pathway, Closed vascular bundles, Scutellum
B
Pea : $C_3$ pathway, Endospermic seed, Vexillary aestivation
C
Tomato : Twisted aestivation, Axile placentation, Berry
D
Onion : Bulb, Imbricate aestivation, Axile placentation
Detailed Solution
Maize: it has closed vascular bundles and a scutellum, but it is a $C_4$ plant, so '$C_3$ pathway' is wrong.
Pea: it is a $C_3$ plant with vexillary (papilionaceous) aestivation, but its seed is non-endospermic (the food is stored in the cotyledons), so 'endospermic seed' is wrong.
Onion: it has a bulb and axile placentation, but the perianth of Liliaceae shows valvate aestivation, so 'imbricate aestivation' is wrong.
Tomato (Solanaceae): the ovary is bicarpellary with axile placentation and the fruit is a berry; it is the option accepted as correctly matched in the answer key.
Hence the correctly matched organism is tomato: twisted aestivation, axile placentation, berry.
Pea: it is a $C_3$ plant with vexillary (papilionaceous) aestivation, but its seed is non-endospermic (the food is stored in the cotyledons), so 'endospermic seed' is wrong.
Onion: it has a bulb and axile placentation, but the perianth of Liliaceae shows valvate aestivation, so 'imbricate aestivation' is wrong.
Tomato (Solanaceae): the ovary is bicarpellary with axile placentation and the fruit is a berry; it is the option accepted as correctly matched in the answer key.
Hence the correctly matched organism is tomato: twisted aestivation, axile placentation, berry.