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

Picture shows

  1. (a) enlarged view of a pollen grain

  2. (b) stages of a microspore maturing into a pollen grain

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice

Picture shows

  1. Scanning electron micrograph of a few pollen grains

  2. Electron micrograph of a few pollen grains

  3. micrograph of a few pollen grains

  4. All
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice

Pollen grains are shed at

  1. 2 - celled stage in 60 % of angiosperms

  2. 3 - celled stage in rest of the angiosperms

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Angiosperms shed pollen at either the 2-celled stage (about 60 percent of species) or the 3-celled stage (the remainder).

Multiple choice

Mature pollen grains contain

  1. Large vegetative cell with abundantfood reserve &irregularly shaped nucleus

  2. Small generative cell that floats in cytoplasm of vegetatuve cell

  3. Both

  4. None.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A mature pollen grain consists of a large vegetative cell with food reserves and a smaller generative cell floating within it.

Multiple choice

Pollen grains

  1. Spherical measuring 25 - 50 micrometers in diameter

  2. has outer hard discontinuous layer EXINE made up of sporopollenin

  3. Inner continuous layer INTINE made up of Cellulose & Pectin

  4. All
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pollen grains are generally spherical, 25-50 micrometers in diameter, and possess an outer exine (sporopollenin) and an inner intine (cellulose and pectin).

Multiple choice

Pollen grains represent the

  1. Female gametophyte

  2. Male gametophyte

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pollen grains are the immature male gametophytes in seed plants. They contain the male gametes necessary for fertilization.

Multiple choice

Picture shows

  1. (a) T.S. of young anther

  2. (b) Enlarged view of one microsporangium showing wall layers

  3. (c) A mature dehisced anther

  4. All
Reveal answer Fill a bubble to check yourself
D Correct answer
Multiple choice

Find true about structure of Microsporangium

  1. Circular in outline and surrounded by 4 wall layers

  2. Epidermis,Endothecium,Middle layers and Tapetum

  3. 3 layers gibes protection while Tapetum nourishes developing pollen grains

  4. All
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A microsporangium is circular, surrounded by four wall layers (epidermis, endothecium, middle layers, tapetum), and the tapetum provides nourishment.

Multiple choice

Pollen sacs are packed with

  1. Pollen grains

  2. Pollen tubes

  3. Both

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

Pollen sacs are the chambers within the anther that contain the developing and mature pollen grains.