The Leaf and Its Parts

Q.

What are bulliform cells? what are their functions?

Q.

What is the internal structure of a leaf?

Q. The stalk of the leaf is called

1. pedicel
2. peduncle
3. stipule
4. petiole

Q. Which of the following is not a part of the leaf?

1. Lamina
2. Petiole
3. Stipules
4. Node

Q.

Maximum transpiration occurs through

1. Stomata

2. Cuticle

3. Lenticels

4. Bark

Q. Swollen leaf base is called ________ and is found in _______ plants.

1. pulvinus, non-leguminous
2. pulvinus, leguminous
3. sheathing, leguminous
4. sheathing, non-leguminous

Q.

What are the main functions of a leaf?

Q. Phloem fibers are made up of which type of tissue?

1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Aerenchyma

Q. In monocots, __________ leaf base is present.

1. pulvinus
2. sheathing
3. decurrent
4. none of these

Q. Explain different stages of root nodule formation?

Q. Does chlorophyll-a show another absorption peak at any other wavelengths too? If yes, which one?

Q. The walking fern is so named because:

1. It propagates vegetatively by its leaf tips
2. It knows how to walk by itself
3. Its spores are able to walk
4. It is dispersed through the agency of walking animals

Q.

Which is the ventral surface of the leaf?

Q. Read the assertion and reason carefully to mark the correct option in question.

Assertion: Bract is a reduced leaf found at the base of the pedicel.

Reason: Flowers with bracts are called ebracteate and those without bracts, abracteate.

Q. Which of the following statements is incorrect about simple leaves?

1. The lamina is undivided
2. When the lamina is divided, the incisions of the lamina do not touch the midrib
3. The lamina does not bear leaflets
4. Bud is absent in the axil of the petiole of simple leaf

Q. Dwarfness can be controlled by treating plants with

1. cytokinin
2. gibberellic acid
3. auxin
4. antigibberellin

Q. Phellogen is

1. Intercalary meristem
2. Apical meristem
3. Primary meristem
4. Secondary meristem

Q. Which of the following is an effect of abscisic acid on plants?

1. Inhibition of plant growth and metabolism
2. Opening of stomata
3. Induces seed germination
4. All the above

Q.

Difference between Simple leaf & compound leaf

Q. The given figures show some examples of angiosperms as A, B, C and D. All these are capable of giving rise to new offspring with the help of vegetative propagules. Identify the correct unit of vegetative propagules present in these angiosperms.

1. A - Tuber B - Rhizome
   C - Bulb D - Leaf buds

2. A - Offset B - Stolon
   C - Sucker D - Leaf buds

3. A - Offset B - Sucker
   C - Stolon D - Leaf buds
   
4. A - Tuber B - Rhizome
   C - Bulbil D - Leaf buds

Q.

Study the following statements and select the option with correct statements.
I. Pulvinus leaf base is present in some leguminous plants.
II. In Eichhornia, the petioles expand, becomes green and synthesize food.
III. Opposite phyllotaxy is seen in guava.

1. I and II

2. I and III

3. II and III

4. I, II and III

Q.

Transport of food in plants takes place through ____.

1. Flowers

2. Phloem

3. Stomata

4. Epidermis

Q. Explain the internal structure of the leaf?

Q. Which of the following is not a part of the leaf?

1. Lamina
2. Petiole
3. Stipules
4. Node

Q. Bulliform cells are seen in –

1. Monocotyledonous Stem
2. Dicotyledonous Stem
3. Dorsiventral Leaf
4. Isobilateral Leaf

Q. $I.$ Find out the wavelength (colour of light) at which chlorophyll $‘a^{\prime }$ shows the maximum absorption?
$II.$ Does chlorophyll-a show another absorption peak at any other wavelengths too? If yes, which one?

Q. What is capacitation and in which its occur?

Q.

State the function of a leaf.

Q. In monocots, __________ leaf base is present.

1. pulvinus
2. sheathing
3. decurrent
4. none of these

Q. Chief functions of leaves are

1. Transpiration and photosynthesis
2. Respiration and photosynthesis
3. Respiration and digestion
4. Respiration and transpiration