Question:
In a longitudinal section of a root, starting from the tip upward, the four zones occur in the following order
In a longitudinal section of a root, starting from the tip upward, the four zones occur in the following order
Updated On: Jun 23, 2024
Root cap, cell division, cell maturation, cell enlargement
Cell division, cell enlargement, cell maturation, root cap
Cell division,cell maturation, cell enlargement, root cap
Root cap, cell division, cell enlargement, cell maturation
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The Correct Option is D
Solution and Explanation
The root tip is divided into four distinct zones, each characterized by primary meristematic tissues serving unique functions. The first zone is the root cap, consisting of parenchyma cells at the tip. The second zone is the zone of cell division, housing the apical meristem where cell division occurs approximately every 12-36 hours. In the third zone, known as the zone of elongation or enlargement, cells increase in length. Finally, in the fourth zone, called the zone of maturation, cells differentiate into specific cell types like epidermal cells and cortex cells. So, the accurate sequence is 'Root cap, cell division, cell enlargement, cell maturation.'
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Concepts Used:
Plant Kingdom
The Plant Kingdom comprises all the plants that have some shared characteristics. These are bacteria (prokaryotes), photosynthetic plants, fungi, and several non-photosynthetic plants.
Read Also: Two Kingdom Classification
Several features of Kingdom Plantae are as follows:
- They are stationary. They are static and usually remain in one place only.
- They have branches that expanded and green leaves due to the presence of chlorophyll.
- They are an autotrophic mode of nutrition that simply means they prepare their food with the help of water, sunlight and carbon dioxide. It is further known as self-nutrition.
- They indulge in photosynthesis during the day and therefore more carbon dioxide is needed during the day and at night it is released.
- They secure their food in the form of starch-like algae.
- They have an inelastic wall around their cell known as a cell wall comprised of cellulose.
- There is an absence of the nervous system and excretory system.
- Reproduction is entirely dependent on air, insects and water. Asexual and vegetative method of reproduction is noticed or detected.
- The non-photosynthetic plants acquire their food through parasitism, i.e through their host like Indian pipe.
Read More: Classification of Plants