What is reticulate venation?

Jasmine Grover logo

Jasmine Grover

Education Journalist | Study Abroad Lead

Venation refers to the arrangement of veins on the lamina of a leaf. Venation is of two types – Reticulate and parallel venation.

  • Reticulate venation is a type of leaf venation pattern in which the veins form a network or mesh-like pattern, with the veins branching out and intersecting in a manner that appears interlaced. 
  • Veins are joined to produce a web-like network.
  • Characteristics: Reticulate venation is characterized by its net-like arrangement of veins, with the veins branching out from the midrib and intersecting each other.
  • Function: The reticulate venation pattern helps to distribute water, nutrients, and minerals throughout the leaf more efficiently.
  • Examples: Reticulate venation is common in many plant species, including ferns, leaves of tulsi, rose bushes, and maple trees, monocots (such as grasses), and dicots (such as roses and tomatoes).
  • Evolution: Reticulate venation has evolved as a means of improving the efficiency of leaf function, particularly in species that grow in hot, dry conditions.
  • Other Types: There are two other main types of leaf venation patterns: parallel venation, in which the veins run parallel to each other, and dichotomous venation, in which the veins branch off in two directions.
  • Adaptation: Reticulate venation is an adaptation that has developed over time as a means of optimizing leaf function in different plant species and growing conditions.

Reticulate Venation

Check More:

CBSE CLASS XII Related Questions

  • 1.
    Read the following passage and answer the questions that follow:
    India is one of the megadiverse countries housing around 8·1 per cent of global species diversity, although its land area is only 2·4 per cent of the world’s land area. Many of the species are highly threatened due to human activities like deforestation, mining and habitat fragmentation. Laws like Wildlife (Protection) Act, 1972 were enacted by the Government of India to preserve our biological wealth. Various conservation measures are being implemented to save the threatened species. The following bar graph shows the number of species conserved under different biodiversity conservation methods.

    Which other methods shown in the diagram are opposite to the one identified by you in question ? How are these two conservation approaches different?
    (c) Write two features of Biodiversity hotspots.
    (c) To which category do sacred groves belong and how do they help in bio-conservation?


      • 2.
        Cow dung and water are mixed and fed into a biogas plant to allow digestion of biowastes. The person performing this process says that there is no need to provide an inoculum.
        Do you agree with him? Justify your answer.
        What happens to the biowaste inside the digester ?
        (c) Name the useful by-products obtained from this process and mention how they are used.


          • 3.
            Oogenesis is a discontinuous process that begins before birth and is completed after puberty.
            Trace the development of a gamete mother cell till its release from the ovary during ovulation.
            Name the two pituitary hormones that play an important role in the process.


              • 4.
                Name the phenomenon that leads to situations like ‘XO’ abnormality in humans. Also name this genetic disorder. How are individuals with an XO chromosomal abnormality affected? Write its symptoms as well as karyotype.


                  • 5.
                    Draw a neat diagram of a maize grain showing the internal structure and label any five parts.


                      • 6.
                        What is the carrying capacity of a species in a habitat?
                        Explain the growth curve that takes this capacity into account.

                          CBSE CLASS XII Previous Year Papers

                          Comments


                          No Comments To Show