Tag: morphology of leaf

Questions Related to morphology of leaf

Read the following matches.

(i) Guava Spiral phyllotaxy
(ii) Ruscus Cladode
(iii) Opuntia Phylloclade's
(iv) Mustard Spiral phyllotaxy


Which of these are correct?

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. (i), (ii) and (iii)

  2. (ii), (iii) and (iv)

  3. (i), (iii) and (iv)

  4. (i), (ii) and (iv)

Show answer
Correct Option: B
Explanation:

1) Guava- Opposite phyllotaxy

2) Ruscus- Cladode
3) Opuntia- Phylloclade
4) Mustard- Alternate/spiral phyllotaxy


So the correct option is " B) ii, iii, iv". 

Reticulate venation is not seen in _________.

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. Mango

  2. Maize

  3. Sunflower

  4. Hibiscus

Show answer
Correct Option: B
Explanation:
In reticulate venation, the veins branch and unite forming a complicated network. All the veins are interconnected, like the strands of the net.
Leaves of dicot plants generally have reticulate venation. Maize is a monocot and hence shows only parallel venation.
So, the correct option is 'Maize'.

Veins are _________ strands on the lamina.

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. Conducting

  2. Transpirational

  3. Exceptional

  4. Flattened

Show answer
Correct Option: A
Explanation:

Veins provide support for the leaf and transport both water and minerals (via xylem) and food energy (via phloem) through the leaf and on to the rest of the plant and hence are conducting in their function.

So, the correct option is 'Conducting'.

Parallel venation is a characteristic feature of ..........

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. Monocotyledon

  2. Dicotyledon

  3. Pteridophytes

  4. Bryophytes

Show answer
Correct Option: A
Explanation:


Parallel venation, in which veins run parallel to one another from base to the tips of the leaf. Reticulate venation in which veins are arranged in a net like a pattern on both sides.

Name of the organism  Type of venation
Monocotyledons Parallel
Dicotyledons Reticulate
Pteridophytes Reticulate 
Bryophytes The plant body is not differentiated into root, stem, leaves, lack vascular tissue( Xylem and phloem) and there are no veins i.e. .conducting lines, so venation is not present.

So, the correct option is ' Monocotyledonae '

Leave grow due to presence of 

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. Apical meristan

  2. Diffused meristem

  3. Intercalary meristem

  4. Mass meristem

Show answer
Correct Option: A
Explanation:

The apical meristem, also known as the “growing tip,” is an undifferentiated meristematic tissue found in the buds and growing tips of roots in plants.
So the correct option is 'Apical meristem'.

If a leaf has more than one prominent vein it is said to be

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. Unicostate

  2. Multicostate

  3. Pinnate

  4. Palmate

Show answer
Correct Option: B
Explanation:
  • Venation in which the lamina has more than one equally prominent or principal veins is Multicostate reticulate venation
  • They give rise to lateral veins connected by reticulations of veinlets. 
  • Multicostate reticulate venation has two forms. Convergent and Divergent.
  • Hence, If a leaf has more than one prominent vein, it is  Multicostate.
  • So, the correct answer is 'Multicostate'.

The monocotyledons showing reticulate venation is

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. Smilax

  2. Dioscorea

  3. Both A and B

  4. None of the above

Show answer
Correct Option: C
Explanation:
  • Reticulate venation is found in dicot leaves, while in monocot. Reticulate venation is found in dicot leaves, while in monocot leaves venation is of parallel type.
  •  Monocot having reticulate venation, e.g., Smilax, Colocasia, Dioscorea.
  • Hence, The monocotyledons showing reticulate venation is Smilax and Dioscorea.
  • So, the correct answer is 'Both A and B

The monocotyledonous leaf shows which of the following venation?

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. Pinnate reticulate

  2. Parallel

  3. Palmate reticulate

  4. Pinnate parallel

Show answer
Correct Option: B
Explanation:
  • Parallel venation refers to a pattern in the veins of a leaf where the secondary veins run parallel to each other off of a central, perpendicular primary vein. 
  • The best example for parallel venation is banana. Some of the monocotyledons like bajra, sorghum, maize, wheat, rice, grasses, coconut, palm and then dicots like mango also the examples of parallel venation.
  • Hence, The monocotyledonous leaf shows Parallel venation.
  • So, the correct answer is 'Parallel'.

Reticulate venation is observed mostly in

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. Monocot plants

  2. Dicot plants

  3. Thallophytes

  4. Bryophytes

Show answer
Correct Option: B
Explanation:

Venation is the arrangement of veins in a leaf. In reticulated venation, veins are interconnected and form a web-like network. There is a prominent vein called the midrib from which many small veins arise which finally form a net-like structure in the lamina. This kind of venation is seen in dicots. for example, mango.

Venation is the ________________.

botany leaf - external morphology venation arrangement of leaves morphology of leaf

  1. arrangement of leaves on the stem

  2. arrangement of veins on the lamina

  3. arrangement of leaves in bud.

  4. folding of leaves in bud.

Show answer
Correct Option: A