Filiform apparatus is a characteristic feature of:
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: B
Answer: Synergid
Explanation: The synergids have special cellular thickenings at the micropylar tip called filiform apparatus.
Which part of the flower forms the seed coat?
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: B
Answer: Integuments
Explanation: Integuments of ovules harden as tough protective seed coats.
In angiosperms, functional megaspore develops into:
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: A
Answer: Embryo sac
Explanation: Only the functional megaspore develops into the female gametophyte (embryo sac).
Attractants and rewards are required for:
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: A
Answer: Entomophily (Insect pollination)
Explanation: To sustain animal visits, the flowers have to provide rewards to the animals. Animals are attracted to flowers by colour and/or fragrance.
The hilum is a scar on the:
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: B
Answer: Seed, where funicle was attached
Explanation: The body of the ovule fuses with funicle in the region called hilum.
Transmission tissue is characteristic of:
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: A
Answer: Solid style
Explanation: Though not explicitly detailed in the excerpt, the text mentions pollen tube growth through tissues of the style. The concept implies tissue allowing growth.
Which one of the following is surrounded by a callose wall?
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: A
Answer: Microspore mother cell
Explanation: Implied in the process of microsporogenesis where PMC gives rise to tetrads.
Male gametophyte in angiosperms produces:
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: C
Answer: Two sperms and a vegetative cell
Explanation: When the pollen grain is mature it contains two cells... the generative cell divides... to give rise to the two male gametes.
Which of the following are the important floral rewards to the animal pollinators?
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: D
Answer: Nectar and pollen grains
Explanation: Nectar and pollen grains are the usual floral rewards.
Which one of the following may require pollinators, but is genetically similar to autogamy?
[Sexual-Reproduction-in-Flowering-Plants] [class-xii]
Correct Option: C
Answer: Geitonogamy
Explanation: Geitonogamy... genetically it is similar to autogamy since the pollen grains come from the same plant.