Tag: leaf - external morphology

Quizzes (2) Questions (114)

Questions Related to leaf - external morphology

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

Epistomatic leaf is present in

  1. Nymphaea

  2. Nelumbo

  3. Victoria

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

Leaves, in which stomata are present on the upper epidermis are called epistomatic leaves. In Nympheae, Nelumbo, Victoria, epistomatic leaves are present.

So, the correct option is ‘All of the above’.

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

Chief functions of leaves are

  1. Transpiration and photosynthesis

  2. Respiration and photosynthesis

  3. Respiration and digestion

  4. Respiration and transpiration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The function of the stomata is to allow water vapor and gases to pass in and out of the leaf. The stomata are also responsible for the process of transpiration, the rate at which a plant loses water. Air enters the plant through the stomata. The air contains carbon dioxide which is used in the photosynthesis process. Then the transpiration and photosynthesis are the main functions of leaves.

So, the correct option is A.

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

In floating leaved plants, stomata occur on.

  1. Lower surface

  2. Upper surface

  3. Both surfaces

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

Hydrophytes, in which root system is rooted in the soil and their leaves float on the surface of water. In these leaves, stomata are present on the upper epidermis or surface. Such leaves are called Epistomatous leaves. Eg:Nelumbo, Nympheae.

So, the correct option is ‘Upper surface’.

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

In the veins of leaves, the phloem is situated towards

  1. Upper epidermis

  2. Lower epidermis

  3. All around the xylem

  4. Lateral to xylem
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the vascular bundles of leaves, xylem is situated towards the adaxial or upper epidermis side and phloem is situated towards the abaxial or lower epidermis side.

So, the correct option is ‘lower epidermis’.