Q21
The plant parts which consist of two generations one within the other are
Correct Answer
Option C
Solution
(c) Pollen grains inside the anther (gametophyte in sporophyte) and embryo sac inside the ovule.
Sexual Reproduction in Flowering Plants
Q22
Nucellar embryo is
Correct Answer
Option D
Solution
(d) Nucellus is diploid; nucellar embryo is apomictic diploid.
Q23
Development of an organism from female gamete/egg without involving fertilization is
Correct Answer
Option D
Solution
(d) Parthenogenesis: development from unfertilized egg.
Q24
The polyembryony commonly occurs in
Correct Answer
Option A
Solution
(a) Polyembryony = more than one embryo per seed; commonly found in Citrus.
Q25
Which plant will lose its economic value if its fruits are produced by induced parthenocarpy?
Correct Answer
Option B
Solution
(b) In pomegranate the seeds form the edible part, so parthenocarpy (seedless fruits) would eliminate economic value.
Q26
Nucellar polyembryony is reported in species of
Correct Answer
Option A
Solution
(a) Nucellar polyembryony is reported in Citrus species.
Q27
A fruit developed from hypanthodium inflorescence is called
Correct Answer
Option B
Solution
(b) Syconus (fig) develops from hypanthodium inflorescence.
Q28
A dioecious flowering plant prevents both
Correct Answer
Option A
Solution
(a) Dioecious plants: male and female flowers on separate plants — prevents autogamy and geitonogamy.
Q29
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
Correct Answer
Option B
Solution
(b) Wind-pollinated flowers commonly have single ovule per ovary, packed in inflorescence.
Q30
Total number of meiotic divisions required for forming 100 zygotes of wheat
Correct Answer
Option C
Solution
(c) 25 MMCs (for 100 pollen) + 100 megaspore MMCs = 125 meiotic divisions.
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