Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

Multiple choice botany leaf - external morphology morphology of leaf structure of a leaf the leaf

 Cuticle is made up of 

  1. Glycerol and hydrocarbon polymers impregnated with wax

  2. Lipid and hydrocarbon polymers impregnated with wax

  3. Fatty acid and hydrocarbon polymers impregnated with wax

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The protective and waxy covering around the epidermis of leaves, young shoots and other aerial parts of a plant is called a cuticle. it is made up of lipid and hydrocarbon polymers integrated with wax. It is formed by the epidermal cells. It acts as the permeability barrier for water soluble substances and water molecules and checks the evaporation of water from the epidermis. So, the correct option is B.
Multiple choice botany leaf - external morphology morphology of leaf structure of a leaf the leaf

Presence of sheathing leaf base and ligule are characteristic of

  1. Cycas leaf

  2. Fern leaf

  3. Banana leaf

  4. Grass leaf
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A ligule is an outgrowth present at the junction of leaf sheath and lamina in grass leaf. It occurs at the end of petiole at the leaf base. It is a strap-shaped extension of the corolla. It is a membranous appendages. Grass leaf also has sheathing leaf base. 

Thus, the correct answer is 'Grass leaf.'

Multiple choice botany leaf - external morphology morphology of leaf structure of a leaf the leaf

Largest number of chloroplasts in the leaf is in.

  1. Spongy tissue

  2. Palisade tissue

  3. Guard cells

  4. Bundle sheath
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A. Spongy tissue – parenchyma with less number of chloroplast.

B. Palisade tissue – parenchyma with more number of chloroplast.

C. Guard tissue – modified epidermal cells with chloroplast, present in the stomata.

D. Bundle sheath – Thick walled parenchymatous sheath present around the vascular bundles in leaves.

So, the correct option is ‘Palisade tissue’.

Multiple choice botany leaf - external morphology morphology of leaf structure of a leaf the leaf

Petiole part of the leaf is also known as

  1. Epipodium

  2. Mesopodium

  3. Hypopodium

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The foliage leaf consists of three parts, namely leaf base, petiole and lamina. The leaf base is also called as hypopodium. The petiole part of the leaf is also called as mesopodium. The lamina part of the leaf is called as epipodium.

Thus, the correct answer is 'Mesopodium.'

Multiple choice botany leaf - external morphology morphology of leaf structure of a leaf the leaf

Which one of the following possesses winged petiole?

  1. Citrus

  2. <p>Bombax</p>

  3. <p>Acacia</p>

  4. <p>Asparagus</p>
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Winged petiole is the petiole in which there is a thin flange of tissue along the length of the petiole. It is a green flattened petiole. Plants like Citrus and Dionaea possess winged petiole. Thus, the correct answer is 'Citrus.'

Multiple choice botany leaf - external morphology morphology of leaf structure of a leaf the leaf

Leaf base is sheathing in

  1. Wheat

  2. Maize

  3. Grass

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In grasses and many monocots, the leaf base (petiole) is broad and surrounds the stem as an envelope. Such a leaf base is known as sheathing leaf base. In grasses such as wheat, maize and grass, the sheathing leaf base protects the intercalary meristem. Hence, the plants belonging to family Poaceae have sheathing leaf base.

So, the correct answer is 'All of the above'.