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 characteristics is related to the complex tissue xylem?

  1. It has only one type of dead cells.

  2. It is a complex tissue which transports sap.

  3. Conduction is inhibited by heat.

  4. Transport takes place due to the presence of positive pressure.

  5. It is a complex tissue which takes part in transport of food.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Xylem is a complex tissue which transports sap (water and minerals).

Multiple choice

In hollow hearted plants

  1. root will die first

  2. shoot will die first

  3. neither root nor shoot will die

  4. root and shoot will die at the same time

  5. none of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In hollow hearted plants, neither root nor shoot will die.

Multiple choice

Tyloses are found in

  1. the primary xylem consists of small tracheids and vessels and lacks tyloses

  2. secondary xylem

  3. secondary phloem 

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

Secondary xylem is absent in non-woody plants and is present in trees and shrubs. Its cell walls are thickened by deposition of lignin, thereby, rendering mechanical support to such plants. The second  xylem consists of small tracheids and vessels and tyloses.

Multiple choice

A 'thallus' refers to plant body having

  1. vascular system

  2. stem and leaves but no roots

  3. root and stem but no leaves

  4. no distinction of stem, leaves and roots
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A thallus is an undifferentiated plant body that lacks distinct stem, leaves, and roots. This term is used for simple plants like algae, fungi, and some bryophytes where vegetative tissues are not organized into specialized organs. Options A, B, and C all describe differentiated structures, which contradicts the definition of thallus.

Multiple choice

What type of chloroplast is present in spirogyra?

  1. Ribbon like

  2. Cup shaped

  3. Flask like

  4. Stellate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Spirogyra has ribbon-like (spiral) chloroplasts that wind around the cell in a helical pattern. This distinctive feature gives it its name (spiro = spiral). Cup-shaped chloroplasts (B) are found in Chlamydomonas, flask-shaped (C) in some diatoms, and stellate (D) in Zygnema. The ribbon-like spiral chloroplasts are the identifying characteristic of Spirogyra.

Multiple choice

On which of the following basis are gymnosperms different from angiosperms?

  1. Naked seeds

  2. Stelar system

  3. Ovules

  4. Sporophylls
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gymnosperms produce naked seeds not enclosed in ovaries/fruits, unlike angiosperms where seeds are protected within fruits. Stelar system, ovule structure, and sporophyll organization exist in both groups with variations, but naked seeds remain the fundamental distinguishing characteristic.

Multiple choice

Vascular plants

  1. are also called higher plants
  2. are primarily land plants
  3. have xylem tissue for conducting water and minerals throughout the plant

Which of the above are true?

  1. Both 1 and 2

  2. Both 2 and 3

  3. Both 1 and 3

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

Vascular plants (from Latin vasculum: duct), also known as tracheophytes (from the equivalent Greek term trachea) and also higher plants, form a large group of plants that are defined as those land plants that have lignified tissues (the xylem) for conducting water and minerals throughout the plant. They also have non-lignified tissue to conduct products of photosynthesis.

Multiple choice

Where are the buds present in a bryophyllum plant?

  1. On the root

  2. On the stem

  3. On the axil

  4. On the margin of its leaves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, it is correct.It is also known as sprout leaf plant . The leaves when fall on moist soil ,each bud  gives rise to a new plant.