Tag: the leaf

Quizzes (12) Questions (128)

Questions Related to the leaf

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

Pulvinate leaf base is found in

  1. <p>Lycopersicum</p>

  2. <p>Trifolium</p>

  3. <p>Nicotiana</p>

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

Pulvinus is a swollen leaf base. Pulvinate leaf base is found in leguminous plants. It is seen in mango leaves. It is seen in Fabaceae family. Example includes Trifolium pratense.

Thus, the correct answer is 'Trifolium.'

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

Bombax leaf is

  1. Tripinnate

  2. Unipinnate

  3. Multifoliate

  4. Quadrifoliate

  5. Trifoliate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Compound leaves are of two types, namely pinnately compound leaves and palmately compound leaves. In palmately compound leaf, the leaflets are arranged at the tip of the petiole. It is further divided into 5 types depending upon the number of leaflets present at the tip of the petiole. In unifoliate, there is only one terminal leaflet is attached at the top of petiole. Example includes Citrus. In bifoliate, two leaflets are attached side by side at the terminal end of petiole. Example includes Balanites roxburghii. In trifoliate, three terminal leaflets are attached at the terminal end of petiole. Example includes Aegle marmelos. In quadrifoliate, four leaflets are attached to the tip of petiole. Example includes Paris quadrifolia. In multifoliate, five or more leaflets are present at the tip of petiole in the form of fingers of the palm. Example includes Bombax malabarica.

Thus, the correct answer is 'Multifoliate.'

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

A mature ligule, having a prominent basal portion is called as

  1. Glossopodium

  2. Rhizophore

  3. Trichome

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

A ligule is a variously modified extension of the sheath lying at the base of the blade. While this vegetative part of the leaf blade of the family of grasses, is often a vertical membrane present as an outgrowth at the inner junction of the leaf sheath and blade, in heterosporus lycophytes, this is one of the enigmatic structures. The term which means a little tongue is an appendage that is found at the adaxial side of the leaves. Found in mostly Selaginellales and Isoeteles, the mature ligule shows four regions, sheath, glossopodium, main body and apex. The sheath is the base of the ligule which is composed of long tube shaped cells. The glossopodium is found just above the sheath as vaculoted cells.
Therefore, the correct option is A.

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’.

Multiple choice biology the leaf morphology of leaf structure of a leaf basics of leaf and flower

Main function of leaf is _____.

  1. Transpiration

  2. Exchange of gases

  3. Photosynthesis

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

The main function of leaf is photosynthesis. It produces food for the plant. It has a photosynthetic pigment chlorophyll which converts solar energy into chemical energy. The leaf is also involved in the transpiration process. The transpiration process helps in cooling of plant. The exchanges of gases takes place through stomata present on the leaves.

Thus, the correct answer is 'Photosynthesis.'