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

Centripetal xylem is present in:

  1. roots

  2. all the stems

  3. monocot stems only

  4. dicot stems only

  5. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Centripetal xylem is present in roots.

Multiple choice

Bordered pits are commonest in:

  1. monocots

  2. dicots

  3. gymnosperms

  4. pteridophytes

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

Bordered pits are commonest in gymnosperm. Gymnosperms are plants of a group that comprises those that have seeds unprotected by an ovary or fruit, including the conifers, cycads, and ginkgo.

Multiple choice

The cork tissue is also known as:

  1. phelloderm

  2. phellogen

  3. phellem

  4. periderm

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

The cork tissue is also known as phellem. Phellem is the outer tissue of bark; a protective layer of dead cells.

Multiple choice

Youngest layer of secondary xylem is nearest to:

  1. pith

  2. cambium

  3. pericycle

  4. cortex

  5. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The youngest layer of secondary xylem is the nearest to cambium. It is a cellular plant tissue from which phloem, xylem or cork grows by division, resulting (in woody plants) in secondary thickening.

Multiple choice

______________ involves the removal of stamens from bisexual flowers of the female parents in order to avoid self-pollination in these flowers. It is done before the anthers are mature.

  1. Animal husbandry

  2. Pisciculture

  3. Poultry farming

  4. Hybridisation

  5. Emasculation
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

For hybridisation, one plant is selected as male and the other one as female. The anthers of female plants are removed at the bud stage to prevent self-pollination. This process is called emasculation. Hence, it is the correct option.

Multiple choice

The two kinds of elements present in a xylem are

  1. sieve tubes and vessels

  2. sieve tube and companion cells

  3. guard cells and fibres

  4. tracheids and vessels
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The xylem tissue, vessels and tracheids of the roots, stems and leaves are interconnected to form a continuous system of water-conducting channels reaching all parts of the plant. So, option 4 is correct.

Multiple choice

One oogonium forms

  1. 1 ovum + 1 polar body

  2. 1 ovum + 3 polar bodies

  3. 1 ovum without centrioles + 3 polar bodies

  4. 1 ovum and no polar body

  5. NA
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

One primary oocyte will form one secondary oocyte + 1 polar body after meiosis 1.