Question

Parenchymatous tissue is characterized by the presence of
A. Thickenings at corners
B. Lignified walls
C. Uniform thickness
D. Intercellular spaces.

Answer 1

Hint: Parenchyma cells store various substances like water, starch, proteins etc. They act as a food and water reservoir and also stored protein is a good source of nitrogen for plants. Parenchyma cells may be specialized as a water storage tissue in succulent plants such as Cactaceae, aloe, agave, etc.

Complete Answer:
Parenchyma tissue typically consists of living cells that are thin-walled, usual in structure, and therefore acceptable with contrast to various functions. The cells are present in many places throughout plant bodies and, given that they are alive, are actively involved in photosynthesis, secretion, food storage, and other activities of plant life.

Now, let us find the solution from the option.
- Parenchyma is a simple tissue which is made up of thin walled polyhedral, isodiametric cells with enough cytoplasm and one or multiple nuclei.
- They function in storage, photosynthesis and as the bulk of ground and vascular tissues.
- But do not give mechanical help to the plant and commonly lack cell wall thickening which is a characteristic property of mechanical tissues.
- Parenchymatous cells are recognized by the presence of well-developed intercellular spaces.

Thus, the correct option is D i.e. intercellular spaces.

Note: Parenchyma is the most usual tissue of the plants with a few special features. It is made of cells which are commonly isodiametric in structure with intercellular spaces. These cells also have active protoplast.