Biology ยท Science General
Botany and Plant Science
4,989 Questions
Botany and plant science delve into the biological study of plant life, covering structural anatomy, physiological processes, and reproductive mechanisms. Key topics include inflorescence patterns, root modifications, and seed development, which are vital for biology sections in medical entrance exams. This collection of practice questions helps solidify understanding of complex plant functions.
Plant ReproductionPlant AnatomyRoot ModificationsInflorescence PatternsPlant Morphology
Botany and Plant Science Questions
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Peepal
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Lady's finger
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Sweet pea
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Salvia
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Apple
E
Correct answer
Explanation
In some plants like apples and grapes, pollen grains of a flower fail to fertilise the flower of the same plant, but fertilise the stigma of the flower borne by another plant of the same species.
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Karyogamy
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Herkogamy
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Dichogamy
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Cleistogamy
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Protogyny
B
Correct answer
Explanation
In herkogamy, anther and stigma are so placed in a flower that the pollen grains are unable to reach the stigma in the same flower.
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Herkogamy
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Heterostyly
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Dichogamy
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Protogyny
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Heterokamy
B
Correct answer
Explanation
In heterostyly, the length of style and the position of anthers are different in a flower.
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Pollen grains are produced in a large number.
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Flowers are light in weight.
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Flowers are small and inconspicuous.
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Plants are monoecious.
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Pollen grains have specific gravity equal to water.
D
Correct answer
Explanation
Plants are dioecious, i.e. male and female flowers borne on separate plants.
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endosperm
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placenta
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synergid
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gametophyte
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micropyle
A
Correct answer
Explanation
Endosperm is a food-storing tissue, which is formed by the fusion of the male gamete and two polar nuclei.
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Petals are small and white coloured.
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They produce copious amount of nectar.
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Pollen grains are produced in small quantity.
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Nectar guides are present.
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Anthers with short filaments are present.
A
Correct answer
Explanation
Petals are large and brightly coloured to attract the insects for pollination.
C
Correct answer
Explanation
Endosperm in plants is 3n as it is formed by the fusion of male gamete (1n) and secondary nucleus (2n).
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It is a small structure contained in the ovary.
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It is surrounded by integuments.
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It has an opening to one side called micropyle.
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It contains single polar nuclei.
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It also contains two synergids and three antipodal cells.
D
Correct answer
Explanation
The embryo sac contains an egg and two polar nuclei.
B
Correct answer
Explanation
Two male gametes are present in a pollen tube. One fuses with the egg and the other fuses with two polar nuclei to form endosperm.
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aleurone
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coleoptile
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scutellum
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coleorhiza
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micropyle
A
Correct answer
Explanation
Endosperm is lined by aleurone layer, which is rich in protein.
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Hilum
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Epicotyl
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Aleurone
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Scutellum
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Coleorhiza
E
Correct answer
Explanation
The radicle lies towards the pointed side of the embryonic region of the seed. It is covered by a protective sheath called coleorhiza.
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Testa
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Tegmen
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Hilum
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Coleoptile
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Micropyle
C
Correct answer
Explanation
Hilum is a whitish oval scar, which marks the area where the seed was attached to the ovary wall.
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It is situated next to the testa.
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It is the pore through which pollen tube enters the ovule during fertilization.
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The seeds absorb water through micropyle.
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It allows diffusion of respiratory gases.
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It helps in the germination of seed.
A
Correct answer
Explanation
Micropyle is present next to the hilum.
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Part of plant embryo above the cotyledon
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Part of plant embryo below the cotyledon
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Area of plant embryo between cotyledons and radicle
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Special food storing tissue in a plant embryo
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Sheath that protects the plumule
A
Correct answer
Explanation
The part of the plant embryo above the cotyledons is called epicotyl.
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Hilum
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Tegmen
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Hypocotyl
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Radicle
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Coleoptile
A
Correct answer
Explanation
Hilum is characterised as a distinct whitish oval scar.