The Leaf

Q.

What are the 4 limiting factors of photosynthesis?

Q.

Which of the following is not a correct match?

1. Petiole: attaches the leaf to stem

2. Lamina: green flat part of the leaf

3. Margin: gives shape to the leaf

4. Veins: transpiration

Q. Tendrils in pea are modified ______.

1. axillary buds
2. terminal buds
3. leaves
4. lateral buds

Q. Small leaf like structures present near the leaf base are called ____.

1. sepals
2. receptacles
3. stipules
4. nodes

Q. Label the parts in the given images:

1. (a). Leaf base, (b) Lamina, (c) Veins, (d) Petiole, (e) Midrib
2. (a). Midrib, (b) Lamina, (c) Veins, (d) Petiole, (e) Leaf base
3. (a). Leaf base, (b) Veins, (c) Lamina, (d) Petiole, (e) Midrib
4. (a). Leaf base, (b) Veins, (c) Petiole, (d) Lamina, (e) Midrib

Q.

Photosynthesis requires the presence of a chemical pigment in the chloroplast. Name the pigment.

1. Chlorophyll

2. Hemoglobin

3. Melanin

4. Cytokinin

Q. The exchange of gases occurs through tiny pores called present at the surface of the leaf.

1. veins
2. stomata
3. lower
4. upper
5. nose
6. lenticel

Q. The green colour of leaves is due to the presence of ___.

1. mitochondria
2. chlorophyll
3. ribosomes
4. lysosomes

Q. The process in which excess water comes out in the form of vapour through leaves is called __________.

1. transpiration
2. photosynthesis
3. respiration
4. digestion

Q. The broad part of a leaf is called ______.

1. petiole
2. vein
3. lamina
4. midrib

Q. What is the petiole of a plant?

1. The flat green part of a leaf.
2. A pigment that imparts the green colour to the leaves.
3. A stalk that attaches the leaf blade to the stem.
4. The region of attachment of the leaf with the stem.

Q. Which of the following processes will not occur if the stomata are absent in a plant?

1. Transpiration
2. Photosynthesis
3. Absorption of water
4. Transportation of food

Q. In water lily, stomata are present in the ___________.

1. lower surface of the leaf
2. both upper and lower surfaces of the leaf
3. upper surface of the leaf
4. stem of the plant

Q. Choose the correct option.
$\begin{array}{cc}\text{a. Transpiration}& \text{i. Arrangement of veins in the lamina}\\ \text{b. Venation}& \text{ii. Preparation of food for the plant}\\ \text{c. Photosynthesis}& \text{iii. Release of excess water through stomata in the form of vapour}\end{array}$

1. a-ii, b-iii, c-i
2. a-i, b-iii, c-ii
3. a-iii, b-i, c-ii
4. a-iii, b-ii, c-i

Q. Which of the following options is correct based on the statements given below?

Statement 1: Gaseous exchanges in plants usually occur on the top side of leaves.

Statement 2: Tiny pores called stomata, facilitate gas exchange.

Statement 3: Carbon dioxide is the by-product of photosynthesis.

1. Only statements 1 and 3 are correct.
2. Only statement 2 is correct.
3. All statements are correct.
4. Only statements 1 is correct.

Q. Plants give out a gas during photosynthesis which humans breathe in. What is this gas called?

1. Sulfur
2. Nitrogen
3. Oxygen
4. Carbon dioxide