Tag: internal structure of dicot leaf

Questions Related to internal structure of dicot leaf

In grass, ligule occurs on

botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Sheathing leaf base

  2. Leaf blade

  3. Petiole

  4. Between sheathing leaf base and leaf blade

Show answer
Correct Option: D
Explanation:

A ligule is a thin outgrowth which is found at the junction of sheathing leaf base (leaf base is broad and surrounds the stem as an envelope) and leaf blade. It is commonly a form of a translucent membrane or a fringe of hairs. The ligule appears to be a continuation of the leaf sheath and encircles the stem as done by the leaf sheath.

So, the correct answer is 'Between sheathing leaf base and leaf blade'.

Amphistomatic leaf, with stomata distributed equally on both the surfaces, is an example of ______________.

botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Isobilateral leaf

  2. Dorsiventral leaf

  3. Xerophytic leaf

  4. Hydrophytic leaf

Show answer
Correct Option: A
Explanation:

Leaf having stomata equally distributed on both surfaces is called amphistomatic (isobilateral) leaf, e.g., most monocot leaves.

Bundle sheath extensions in a dicot leaf and in a monocot leaf are ________ and ________ respectively.
botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Parenchymatous, Collenchymatous

  2. Parenchymatous, Sclerenchymatous

  3. Sclerechymatous, Parenchymatous

  4. Collenchymatous, Sclerenchymatous

Show answer
Correct Option: B
Explanation:
  • In dicot leaf, bundle sheath is generally single-layered and formed of colourless cells. Bundle sheath extensions are parenchymatous. 
  • In monocot leaf, bundle sheath may be single or double layered and the cells generally possess chloroplasts. Bundle sheath extensions are sclerenchymatous.
Thus, the correct option is (B).

Bulliform or motor cells are present on.

botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Root

  2. Stem

  3. Isobilateral leaf

  4. Dorsiventral leaf

Show answer
Correct Option: C
Explanation:

The large sized, thin-walled, water containing colourless epidermal cells present on the adaxial epidermis of an isobilateral leaf or monocot leaf are called bulliform cells.

So, the correct option is ‘Isobilateral leaf’.

Bulliform cells differ from other cells in being

botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Large, thin-walled, vacuolate containing water

  2. Large, thick-walled, contain abundant chloroplasts

  3. Small, thick-walled, contain starch

  4. Small, thin-walled, contain calcium oxalate

Show answer
Correct Option: A
Explanation:

The large sized, thin-walled, vacuolated, water containing colourless epidermal cells present on the adaxial epidermis of an isobilateral leaf or monocot leaf are called Bulliform cells. They differ from other cells in being size, structure and function.

So, the correct option is ‘large, thin-walled, vacuolated containing water’

Which of the following is true about a monocot leaf?

botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Reticulate venation

  2. Absence of bulliform cells from epidermis

  3. Mesophyll not differentiated into palisade and spongy tissues

  4. Well differentiated mesophyll

Show answer
Correct Option: C
Explanation:

In the monocot leaf, mesophyll is undifferentiated, shows spongy parenchyma with oval-shaped cells.

So, the correct option is ‘Mesophyll not differentiated into palisade and spongy tissues'.

An undifferentiated mesophyll is found in

botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Isobilateral leaves

  2. Dorsiventral mesophytic leaves

  3. Dorsiventral xerophytic leaves

  4. Vertical leaves

Show answer
Correct Option: A
Explanation:

A.Isobilateral leaves – Mesophyll is undifferentiated, contains spongy parenchyma only.

B.Dorsiventral mesophytic leaves – Mesophyll is differentiated into upper palisade parenchyma and lower spongy parenchyma.

C.Dorsiventral xerophytic leaves – Mesophyll is differentiated into upper and lower palisade parenchyma and middle spongy parenchyma.

D.Vertical leaves - Mesophyll is differentiated into upper and lower palisade parenchyma and middle spongy parenchyma.

So, the correct option is ‘isobilateral leaves’.

Isobilateral leaves have stomata on

botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Both upper and lower surfaces

  2. Upper surface only

  3. Lower surface only

  4. None of the two surfaces

Show answer
Correct Option: A
Explanation:

In isobilateral leaves or monocot leaves, stomata are present on both upper or adaxial epidermis as well as lower epidermis or abaxial epidermis.

So, the correct option is ‘Both upper and lower surfaces’.

What differentiates a dicot leaf from monocot leaf?

botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Stomata only on upper side

  2. Differentiation of palisade and spongy parenchyma

  3. Parallel venation

  4. Stomata on upper and lower sides

Show answer
Correct Option: B
Explanation:

Dicot leaf differs from monocot leaf anatomically in terms of presence of more number of stomata in the lower epidermis, presence of differentiated mesophyll,  and vascular bundle.

So, the correct option is 'Differentiation of palisade and spongy parenchyma'.

Isobilateral leaf is characterised by

botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of leaf (dicot and monocot) anatomy of leaf internal structure of dicot leaf

  1. Similarly green two surfaces

  2. Amphistomatic nature

  3. Undifferentiated mesophyll

  4. All the above

Show answer
Correct Option: A
Explanation:

Leaf, in which both surfaces are similar in appearance are called isobilateral leaves. These are found in monocotyledons. It is due to the presence of spongy parenchyma.

So, the correct option is ‘Similarly two green surfaces’.