Biology ยท 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

Which of the following roots have beads like structures associated with them?

  1. Respiratory roots

  2. Nodulated roots

  3. Sucking roots

  4. Contractile roots
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It has beads like structures associated with them in which nitrogen fixing bacteria reside. Here nutrition is the vital function performed. It contains nitrates and nitrogen fixing bacteria. Rhizobium is the bacteria present. Plants coming under the pulse group will contain rhizobium (leguminous plants).

Multiple choice

The outermost whorl of the flower is called

  1. Calyx

  2. Corolla

  3. Androecium

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

The outermost whorl consisting of units called sepals; these are typically green and enclose the rest of the flower in the bud stage. However, they can be absent or prominent and petal-like in some species.

Multiple choice

The fruit developing from the inflorescence is known as

  1. Fleshy multiple fruit

  2. Fleshy aggregate fruit

  3. Fleshy simple fruits

  4. An accessory fruit
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fleshy multiple fruit is formed from a cluster of flowers called an inflorescence. Each flower does produce a fruit, but these mature into a single mass. Examples are mulberry, pineapple and breadfruit.

Multiple choice

The diameter of the root may exceeds its length in

  1. Ramose root

  2. Fusiform root

  3. Conical root

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

The napiform root, swells out in its upper part so that its diameter equals or exceeds its length, as in Erigenia bulbosa , Turnips etc..

Multiple choice

What special adaptation is seen in flowers pollinated by moths?

  1. They have large red or orange petals and are scentless.

  2. They have white petals and a strong scent.

  3. They have large coloured petals and a strong scent.

  4. They are small and inconspicuously green in colour.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Moth-pollinated flowers tend to be white, night-opening, large and showy with tubular corollas and a strong, sweet scent produced in the evening, night or early morning.

Multiple choice

Which event leads to endospore formation?

  1. Fusion of egg cell with sperm

  2. Fusion of synergids with sperm

  3. Fusion of polar nuclei with sperm

  4. Fusion of antipodal cells with sperm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fusion of polar nuclei with sperm leads to endospore formation.

Multiple choice

Which of the following is correct about cross-pollination?

  1. There are less chances of failure of pollination.

  2. A small number of pollen grains are required for pollination.

  3. A large number of seeds are formed by this method.

  4. The purity of race is maintained.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A large number of seeds are formed by cross-pollination.

Multiple choice

What is ploidy of endosperm tissue?

  1. Haploid

  2. Diploid

  3. Triploid

  4. Polyploid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Endosperm tissue is triploid as it is formed by fusion of polar nuclei (2n) and male gamete (n).