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501 questions in this collection · Page 9 of 51
Question 81 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Filiform apparatus is a characteristic feature of:
The synergids have special cellular thickenings at the micropylar tip called filiform apparatus.
Question 82 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which part of the flower forms the seed coat?
Integuments of ovules harden as tough protective seed coats.
Question 83 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
In angiosperms, functional megaspore develops into:
Only the functional megaspore develops into the female gametophyte (embryo sac).
Question 84 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Attractants and rewards are required for:
To sustain animal visits, the flowers have to provide rewards to the animals. Animals are attracted to flowers by colour and/or fragrance.
Question 85 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The hilum is a scar on the:
The body of the ovule fuses with funicle in the region called hilum.
Question 86 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Transmission tissue is characteristic of:
Though not explicitly detailed in the excerpt, the text mentions pollen tube growth through tissues of the style. The concept implies tissue allowing growth.
Question 87 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which one of the following is surrounded by a callose wall?
Implied in the process of microsporogenesis where PMC gives rise to tetrads.
Question 88 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Male gametophyte in angiosperms produces:
When the pollen grain is mature it contains two cells... the generative cell divides... to give rise to the two male gametes.
Question 89 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which of the following are the important floral rewards to the animal pollinators?
Nectar and pollen grains are the usual floral rewards.
Question 90 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which one of the following may require pollinators, but is genetically similar to autogamy?
Geitonogamy... genetically it is similar to autogamy since the pollen grains come from the same plant.