Q61. Parthenocarpic fruits develop:
[A] After fertilization
[B] Without fertilization
[C] From thalamus
[D] From receptacle
Show Answer
Correct Answer: [B] Without fertilization
Explanation: Parthenocarpic fruits are fruits that develop without fertilization of the ovary. Such fruits are seedless, e.g., banana, grape. Fertilization is usually required for fruit development (true fruits), thalamus and receptacle form false fruits, and seed develops from ovule after fertilization.
Q62. Which of the following is a false fruit?
[A] Mango
[B] Guava
[C] Apple
[D] Tomato
Show Answer
Correct Answer: [C] Apple
Explanation: Apple is a false fruit (pseudocarp) because in its development, along with the ovary, other floral parts like thalamus also contribute to the fruit formation, making it not just from the ovary. Mango, guava, and tomato are true fruits (developed only from ovary).
Q63. The edible part of apple is:
[A] Pericarp
[B] Thalamus
[C] Mesocarp
[D] Endocarp
Show Answer
Correct Answer: [B] Thalamus
Q64. The seed coat is derived from:
[A] Ovary wall
[B] Ovule integuments
[C] Nucellus
[D] Endosperm
Show Answer
Correct Answer: [B] Ovule integuments
Explanation: Seed coat develops from the integuments (outer layers) of the ovule. Usually, the outer integument forms testa and inner integument forms tegmen, together forming the seed coat, which provides protection to the seed. Ovary wall becomes pericarp, nucellus is tissue within ovule, and endosperm is nutritive tissue within seed.
Q65. The embryo in seed develops from:
[A] Endosperm
[B] Zygote
[C] Ovule
[D] Antipodal cells
Show Answer
Correct Answer: [B] Zygote
Q66. Albuminous seeds are those in which:
[A] Endosperm is completely consumed
[B] Endosperm persists in the mature seed
[C] Embryo is absent
[D] Seed coat is absent
Show Answer
Correct Answer: [B] Endosperm persists in the mature seed
Q67. Non-albuminous seeds are those in which:
[A] Endosperm persists
[B] Endosperm is completely consumed by developing embryo
[C] Embryo is very large
[D] Seed is very small
Show Answer
Correct Answer: [B] Endosperm is completely consumed by developing embryo
Q68. Perisperm is a persistent:
[A] Endosperm
[B] Nucellus
[C] Integument
[D] Embryo sac
Show Answer
Correct Answer: [B] Nucellus
Q69. Coleorhiza and coleoptile are protective sheaths covering:
[A] Radicle and plumule respectively in monocot seed
[B] Plumule and radicle respectively in monocot seed
[C] Cotyledons in dicot seed
[D] Endosperm in monocot seed
Show Answer
Correct Answer: [A] Radicle and plumule respectively in monocot seed
Q70. Scutellum in a grass embryo is:
[A] Coleoptile
[B] Coleorhiza
[C] Cotyledon
[D] Endosperm
Show Answer
Correct Answer: [C] Cotyledon
Explanation: Scutellum is the single cotyledon in grass (monocot) embryos. It is shield-shaped and serves to absorb nutrients from the endosperm during seed germination and seedling establishment. Coleoptile covers plumule, coleorhiza covers radicle, and endosperm is the nutritive tissue itself, scutellum is the cotyledon.