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Question
Match List-I(ocular structures) with List-II(post-fertilization structures) and select the correct answer using the codes given the lists.
List-I List-II a. Ovule 1. Endosperm b. Funiculus 2. Aril c. Nucellus 3. Seed d. Polar nuclei 4. Perisperm
Match List-I(ocular structures) with List-II(post-fertilization structures) and select the correct answer using the codes given the lists.
| List-I | List-II |
| a. Ovule | 1. Endosperm |
| b. Funiculus | 2. Aril |
| c. Nucellus | 3. Seed |
| d. Polar nuclei | 4. Perisperm |
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Solution
The correct option is D A-3, B-2, C-4, D-1
The integumented megasporangium within which meiosis and megaspore formation takes place is known as ovule. It develops into a seed after fertilization.Funiculus is the stalk-like structure. It attaches the ovule to the placenta. It acts as an umbilical cord in plants. After fertilization, it is transformed into aril which is the stalk of the seed.The mass of parenchymatous tissue which is surrounded by integuments is known as nucellus. It encloses embryo sac and provides nourishment to developing embryo. It is generally used up during the development of the embryo. But, sometimes remain outside the endosperm in the form of a thin layer. This thin layer is known as perisperm.During the triple fusion in double fertilization, the other male gamete moves towards the two polar nuclei located in the central cell and fuses with them to produce a triploid primary endosperm nucleus, which is develops into endosperm.So, the correct option is (C).
The integumented megasporangium within which meiosis and megaspore formation takes place is known as ovule. It develops into a seed after fertilization.
Funiculus is the stalk-like structure. It attaches the ovule to the placenta. It acts as an umbilical cord in plants. After fertilization, it is transformed into aril which is the stalk of the seed.
The mass of parenchymatous tissue which is surrounded by integuments is known as nucellus. It encloses embryo sac and provides nourishment to developing embryo. It is generally used up during the development of the embryo. But, sometimes remain outside the endosperm in the form of a thin layer. This thin layer is known as perisperm.
During the triple fusion in double fertilization, the other male gamete moves towards the two polar nuclei located in the central cell and fuses with them to produce a triploid primary endosperm nucleus, which is develops into endosperm.
So, the correct option is (C).
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