Biology ยท 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

What do you mean by girdling of plant?

  1. Complete removal of a strip of bark

  2. Incomplete removal of a strip of bark

  3. Complete removal of xylem

  4. Complete removal of phloem

  5. Complete removal of cork cambium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Girdling of the plant is complete removal of a strip of bark (consisting of cork cambium, phloem, cambium and sometimes going into the xylem) from around the entire circumference of either a branch or trunk of a woody plant.

Multiple choice

Which of the following correctly defines 'Tuber'?

  1. It is a short, and swollen underground stem that bears buds and adventitious roots.

  2. It is a swollen underground stem that bears axillary buds in the axils of scale leaves.

  3. It is a modified stem, which contains one or more axillary buds that form the shoot of the new plant.

  4. It is a swollen, and vertical underground stem that comprises a swollen base surrounded by scale leaves.

  5. A stem that grows obliquely upwards and arches over to the ground at a node.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A tuber is botanically defined as a swollen underground stem that stores nutrients and bears axillary buds in the axils of scale leaves (reduced leaves). Examples include potatoes and yams. Unlike roots, tubers have buds ('eyes') that can grow into new plants. Option A incorrectly describes roots, option C describes bulbs, option D describes corms, and option E describes stolons/runners.

Multiple choice

Which of the following statements is not true for self pollination?

  1. It preserves the parental characters indefinitely.

  2. It leads to loss of vigour and vitality.

  3. It leads to new varieties.

  4. The genetic defects of the plant variety cannot be eliminated.

  5. The flowers need not produce nectar and scent.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

New varieties cannot be obtained by self pollination.

Multiple choice

Which of the following is not correct about cross pollination?

  1. The process is economical.

  2. It is uncertain.

  3. It occurs in unisexual and bisexual flowers.

  4. Seeds produced are viable and healthier.

  5. It is a source of variation in offsprings.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cross pollination is not economical because the flowers have to adapt themselves to attract pollinating agents.

Multiple choice

In which of the following plants do the pollen grains fail to fertilise the flower of the same plant but fertilise the stigma of the flower borne by another plant of the same species?

  1. Peepal

  2. Lady's finger

  3. Sweet pea

  4. Salvia

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

In some plants like apples and grapes, pollen grains of a flower fail to fertilise the flower of the same plant, but fertilise the stigma of the flower borne by another plant of the same species.