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

Which of the following devices is/are developed by flowering plants to discourage self-pollination and to encourage cross-pollination?

  1. Pollen release and stigma receptivity not being synchronised

  2. Anther and stigma being placed in different positions

  3. Self-incompatibility

  4. Production of unisexual flowers

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as all of the above are the devices developed by flowering plants to discourage self-pollination and to encourage cross-pollination.

Multiple choice

Match the following:

 
a. Style 1. It is the receptive tip of a carpel.
b. Stigma 2. It is the basal bulged part of a pistil.
c. Ovary 3. It is the slender part of a pistil.

  1. a - 3, b - 2, c - 1

  2. a - 3, b - 1, c - 2

  3. a - 1, b - 3, c - 2

  4. a - 1, b - 2, c - 3

  5. a - 2, b - 1, c - 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. Style is the slender part of a pistil. Stigma is the receptive tip of a carpel. Ovary is the basal bulged part of a pistil.

Multiple choice

Which of the following statements is/are not correct about C3 plants?

  1. C3 plants occur only in tropical region climates.
  2. Leaves show Kranz anatomy.
  3. Mesophyll cells are not differentiated.
  4. Bundel sheath is absent.

  1. 1 and 2

  2. 1, 2 and 3

  3. 2, 3 and 4

  4. Only 3

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

This option is correct because C3 plants occur in all types of climates, whereas C4 plants occur in tropical region climates. Leaves of C3 plants do not show Kranz anatomy and mesophyll cells are differentiated in C3 plants.

Multiple choice

Which of the following statements is wrong with respect to the androecium?

  1. It is the male part of the flower.

  2. The fourth whorl from outside consists of stamens.

  3. Each stamen has a stalk.

  4. Each stamen has a filament.

  5. The tip of the filament is known as the anther.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The third whorl, not the fourth, from outside consists of stamens. Hence, this statement is wrong.

Multiple choice

Which of the following statements is not true with respect to the xerophytes?

  1. They have extensive root system.

  2. The roots of alfalfa may be more than 30 m long.

  3. Leaves of xerophytes are highly reduced.

  4. Opuntia leaves are modified into small, thick spines.

  5. Xerophytes are generally present in deserts.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Opuntia leaves are modified into long, slender spines, not small, thick spines. Hence, this statement is wrong.