Biology · 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

Multiple choice

Match the following:

 
a. Receptacle 1. It is the green, leaf-like part in the outermost circle of a flower.
b. Sepal 2. It is the little stalk with swollen top just inside the ring of petals in a flower.
c. Stamen 3. It is the base of a flower to which all the parts of a flower are attached.

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

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

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

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

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

This is the correct option. Receptacle is the base of a flower to which all the parts of a flower are attached. Sepal is the green, leaf-like part in the outermost circle of a flower. Stamen is the little stalk with swollen top just inside the ring of petals in a flower.

Multiple choice

In which of the following types of pollination are genetically different types of pollen grains brought to the stigma?

a. Xenogamy b. Geitonogamy c. Autogamy

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

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

This is the correct option. Xenogamy brings genetically different types of pollen grains to the stigma during pollination. It is because in xenogamy, transfer of pollen grains takes place from anther to the stigma of a different plant.

Multiple choice

Which of the following statements is/are false?

a. In flowers of different species, the number and length of stamens are the same. b. The proximal end of the filament is attached to the petal of a flower. c. The pollen sacs extend longitudinally all through the length of an anther.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

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

This is the correct option as this statement is false. In flowers of different species, the number and length of stamens are variable.

Multiple choice

Which of the following statements regarding pollen grains is/are false?

a. The hard outer layer of pollen grains is made up of sporopollenin. b. A mature pollen grain contains vegetative cell and generative cell. c. The exine is the inner wall of a pollen grain that is made up of cellulose and pectin.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only c

  5. Only b and c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The intine is the inner wall of a pollen grain that is made up of cellulose and pectin.

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.