Biology · 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 botany flower to flower importance of pollination flower: parts of a flower flower and pollination

Which of the following options is correct?

  1. Transfer of pollen grains from the anther to the stigma of the same flower-Autogamy

  2. Transfer of pollen grains from the anther of one flower to the stigma of another flower of same plant- Geitonogamy

  3. Transfer of pollen grains from the anther to the stigma of a genetically different plant of same species- Xenogamy

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Autogamy is the transfer of pollen grains from the anther to the stigma of the same flower and genetically same type of pollens are brought to the stigma.
Pollination between two flowers of the same plant is called Geitonogamy. Xenogamy is the transfer of pollen grains from the anther to the stigma of a different flower of a different plant. Therefore, genetically different pollen grains are brought to the stigma.
So, the correct option is 'All of these'. 

Multiple choice botany flower to flower importance of pollination flower: parts of a flower flower and pollination

The transfer of pollens from anther to stigma of the same flower is called as

  1. Cross pollination

  2. Self-fertilization

  3. Cross breeding

  4. Hybridization
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When a pollen grain from a stamen is transferred to the stigma of the same plant, it is called self-pollination. It mainly occurs in bisexual flowers.

So, the correct option is 'Self-fertilization'. 

Multiple choice botany flower to flower importance of pollination flower: parts of a flower flower and pollination

In a flower, the male and female reproductive parts are ............. respectively.

  1. Stamen and pistil

  2. Pistil and stamen

  3. Petals and pistil

  4. Stamen and petals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Stamen and pistil are the male and female reproductive parts respectively.  Stamen has anther that produce pollen grains and stalk known as the filament. Pistil has stigma, style and ovary. The ovary contains egg-producing structures the ovules, the style, a hollow tube that receives the pollen tube and stigma that provides a platform for the pollen grains to land and germinate.
So, the correct answer is 'Stamen and pistil'.
Multiple choice botany flower to flower importance of pollination flower: parts of a flower flower and pollination

Chasmogamy is pollination in.

  1. Bud condition

  2. Closed flowers

  3. Open flowers

  4. Unrelated flowers
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chasmogamy is a plant with a reproductive mechanism in which pollination occurs in chasmogamous flowers. Chasmogamous flowers are showy with open petals and encircling exposed reproductive parts.  Chasmogamous stems from Greek for an open marriage. These are named after the open arrangement of floral structures. 

Once chasmogamous flowers have reached maturity, they unfurl and their stamens and/or style are made available for pollinations correct answer is Chasmogamy, is pollination in open flower.

Thus the correct answer is C.

Multiple choice botany flower to flower importance of pollination flower: parts of a flower flower and pollination

Which of the following flowers are pollinated by wind?

  1. sunflower

  2. corn and willow

  3. buttercup and rose

  4. orchid and wall flower
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Anemophilous flowers have certain characters like:-

  • Production of a large number of pollen grains.
  • Well exposed anther.
  • Stigma is feathery and sticky.
  • Pollen grains are light and non-sticky.
All these properties are found in the flower of corn and willow.
So the correct option is 'Corn and willow'.

Multiple choice biology the flower importance of pollination flower: parts of a flower flower and pollination

Hilum of seed is

  1. Scar of micropyle

  2. Scar of funiculus

  3. Area through which pollen tube enters the ovule

  4. Glandular and attractant region of ovule
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The outer surface of seed shows a scar or mark of attachment with the seed stalk. It is called hilum. There is small pore, called micropyle, which represent the micropyle of ovule.

So, the correct answer is 'Scar of funiculus'.

Multiple choice biology the flower importance of pollination flower: parts of a flower flower and pollination

Residual persistent nucellus is known as

  1. Perisperm

  2. Integument

  3. Pericarp

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A. The nucellus is generally used up during the development of embryo, but in some cases, it remains outside the endosperm in the form of a thin layer, called perisperm.

B. Integuments- These are outer covering of ovule which provide protection to the developing embryo.

C. Pericarp or fruit developed from wall of the ovary.

So, the correct answer is 'Perisperm'.