Seed Structure and Genetic Variation — NEET Biology
📚 Practice ConceptAs they have sufficient food reserves, young seedlings are nourished until they are capable of photosynthesis on their own. The hard seed coat provides protection to the young embryo. Being products of sexual reproduction, they generate new genetic combinations leading to variations.
Match the anther wall layers in Column I with their characteristic features in Column II and primary functions in Column III. Column I (Anther Wall Layer) 1. Epidermis 2. Endothecium 3. Middle layers 4. Tapetum Column II (Characteristic Feature/Fate) a. Outermost, single-layered covering b. Cells develop radial fibrous thickenings c. Consist of 1-3 layers, ephemeral and usually degenerate d. Innermost layer, cells with dense cytoplasm and generally multinucleate Column III (Primary Role) p. Provides mechanical protection to the developing anther q. Nourishes the developing microspores and pollen grains r. Facilitates the release of mature pollen grains by dehiscence s. Contributes to protection in young anther and degenerates at maturity Which of the following combinations is correct?
View solution & NCERT explanation
Correct answer: D — 1-a-p, 2-b-r, 3-c-s, 4-d-q
The question requires matching anther wall layers with their characteristic features and primary functions based on NCERT text. 1. Epidermis: It is the outermost, single-layered covering (Characteristic a). Its primary role is to provide mechanical protection to the developing anther (Function p). So, 1-a-p is correct. 2. Endothecium: Its cells develop radial fibrous thickenings (Characteristic b), which are crucial for its hygroscopic nature. Its primary role is to facilitate the release of mature pollen grains by dehiscence (Function r). So, 2-b-r is correct. 3. Middle layers: They consist of 1-3 layers, are ephemeral, and usually degenerate during maturation (Characteristic c). They contribute to protection in the young anther and degenerate at maturity (Function s). So, 3-c-s is correct. 4. Tapetum: It is the innermost layer, with cells possessing dense cytoplasm and generally being multinucleate (Characteristic d). Its primary role is to nourish the developing microspores and pollen grains (Function q). So, 4-d-q is correct. Combining these, the correct option is D.
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Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.