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

The leaves of ferns are referred to as fronds. Which among the following statements regarding fronds is incorrect?

  1. Fronds may bear hairs, scales and glands.

  2. Fern fronds arise from the stem.

  3. Fern fronds lack sporangia.

  4. Some fronds are not pinnately compound.

  5. If a frond is divided into pinnae, the frond is called once pinnate.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fern fronds often bear sporangia, where the plant's spores are formed, usually on the underside (abaxial surface) of the pinnae, but sometimes marginally or scattered over the frond.

Multiple choice

Flowering plants include both monocots and dicots. Which among the following is not a characteristic of self-pollination in flowering plants?

  1. Progeny shows greater vigour due to continuous self-pollination.

  2. Self-pollinated plants can grow in Arctic regions or in regions of high elevations.

  3. Self-pollination results in inconspicuous flowers.

  4. Self-pollination produces self-fertile offspring.

  5. The purity of race is always maintained.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

New species are not produced due to self-pollination. Progeny shows less vigour due to continuous self-pollination. New characters are not introduced.

Multiple choice

Oxalis is an annual dicot plant bearing bright coloured chasmogamous flowers. Which among the following is not a characteristic of chasmogamous flower?

  1. Genes are exchanged between individuals.

  2. Chasmogamous flowers produce nector.

  3. Chasmogamous flowers exhibit self-fertilisation.

  4. Chasmogamous flowers are large in size.

  5. Fertilisation in a chasmogamous flower usually fails.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A chasmogamous flower is usually smaller and requires less energy to reproduce. It is also structured to bring its reproductive organs into contact, making it more likely that fertilisation will be successful.

Multiple choice

Dicot plants are generally characterised by dorsiventral leaves. Which among the following statements regarding the transverse section through the midrib region of a typical dorsiventral leaf is false?

  1. Veins represent the vascular bundles.

  2. Spongy parenchyma contains very few chloroplasts.

  3. Palisade parenchyma contains a very large number of chloroplasts.

  4. Mesophyll is exclusively composed of sclerenchymatous cells.

  5. Intercellular spaces are absent in epidermis.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mesophyll is the ground tissue that occurs between the two epidermal layers. It is exclusively composed of chlorenchyma cells. The mesophyll is characteristically differentiated into two regions, namely an upper palisade parenchyma and a lower spongy parenchyma.

Multiple choice

Androphore is the internode between

  1. calyx and corolla

  2. corolla and gynoecium

  3. androecium and gynoecium

  4. corolla and androecium

  5. calyx and androecium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The internode between corolla and androecium is called androphore.

Multiple choice

The word monoecious means

  1. when both the essential whorls are present in the same flower

  2. male and female flowers are on the same plant

  3. male and female flowers are on different plants

  4. no essential whorls are present

  5. a type of inflorescence
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When male and female flowers are borne on the same plant, the condition is described as monoecious.