Question:

Which of the following species of plant is considered as the world?s most problematic aquatic weed ?

Updated On: Jun 7, 2022
  • Lantana
  • Eichhornia
  • Brown algae
  • Parthenium (carrot grass)
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The Correct Option is B

Solution and Explanation

The excessive growth of a floating plant, Water Hyacinth (Eichhornia crassipes) has caused havoc in India by blocking our water- ways. In India it is also known as ?Terror of Bengal?. It grows abundantly in nutrient rich water bodies and causes an imbalance in the aquatic ecosystem.
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Concepts Used:

Angiosperms

A type of plant belonging to the kingdom Plantae is angiosperms. The term Angiosperm is acquired from two Greek words: Angio - ‘covered’ and Sperma - ‘seed’. They are the types of plants that contain flowers which is a well-defined feature and the seeds are enfolded within the fruits. Since they can bear both flowers and seeds are also called flowering plants, and also comprises around 80% of the living plants.

The Characteristics of Angiosperms are:

  1. The body of an angiosperm is evidently differentiated into several organs such as leaves, flowers, fruits, roots, stems, and seeds.
  2. Among these organs the decision of labor is well-coordinated, and each organ is peerlessly specialized for specific functions.
  3. Out of all angiosperms, most of them are herbs, shrubs, trees, climbers, etc.
  4. A vessel is the chief water and mineral that conducts Xylem elements.
  5. The sieve tube is the chief food that conducts Phloem elements.
  6. Endosperm has triploid cells.
  7. The angiosperms are basically divided into two groups, based on the presence of the number of cotyledons in the seed. They are
    • Dicotyledonous or Dicot plants
    • Monocotyledonous or Monocots Plants