Biology ยท Science General

Botany and Plant Science

5,038 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

Multiple choice

Which among the following is not a characteristic of self pollination in plants?

  1. The purity of race is always maintained.

  2. They produce self-fertile off-springs.

  3. They bear inconspicuous flowers.

  4. They can easily grow in Arctic regions or at regions of high elevations.

  5. The progeny shows greater vigor due to continuous self pollination.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

New species are not produced due to self pollination. Progeny shows less vigor due to continuous self pollination. New characters are not introduced.

Multiple choice

Which among the following can be excluded from the characteristics of chasmogamous flower?

  1. Self-fertilize

  2. Larger flowers

  3. Produces nectar

  4. Genes are exchanged between individuals

  5. Fertilization often fails
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A cleistogamous flower is usually smaller and requires less energy to produce. It is also structured to bring its reproductive organs into contact, making it more likely that fertilisation will be successful.

Multiple choice

Select the false statement regarding the fertilization process in angiosperms?

  1. The growth of pollen tube is controlled vegetative cytoplasm.

  2. After fertilization, the ovary develops into a fruit.

  3. Triple fusion occurs in embryo sac.

  4. Diploid zygote is formed in the embryo sac.

  5. The pollen tube reaches the ovary in a straight line.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The pollen tube does not reach the ovary in a straight line. The pollen tube grows near the style and curls to the bottom of the ovary and then near the receptacle. The pollen tube then breaks into the ovule through the micropyle and then the micropyle bursts into the embryo sac.

Multiple choice

An inflorescence is a cluster of flowers arranged on a stem that is composed of a main branch with the arrangement of several branches. The inflorescence stops growing in ______________.

  1. solitary cyme

  2. simple cyme

  3. hypanthodium

  4. cyathium

  5. spikelet

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Here the growth of the peduncle is definite because it terminates in a flower. Below this flower, two branches develop laterally in the axis of opposite bracts. These branches also end in flowers. There is no further growth of the inflorescence.

Multiple choice

More than one embryo occurs in

  1. citrus

  2. mirabilis

  3. hibiscus

  4. bacteria

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Polyembryony is the phenomenon of two or more embryos developing from a single fertilised egg.

Multiple choice

Pollen grain is a

  1. megaspore

  2. microspore

  3. microsporophyll

  4. microsporangium

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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