Question

2. Differentiate between cells of:
(a) Parenchyma and collenchyma
(b) Meristematic tissue and permanent tissue
(c) Sclerenchyma and parenchyma
(d) Cells of involuntary and voluntary muscle
(e) Fibres of voluntary muscle and cardiac muscle.​

Answer 1

Answer:

Parenchyma

Living tissues with thin cell wall with central vacuole and dense cytoplasm. Parenchyma cells are located in the soft parts of the plants such as pith and cortex.

Sclerenchyma

These are dead tissues which have thick cell wall due to deposition of lignin. They are generally located in the leaf veins, hard coverings of the seeds and can also be found surrounding the vascular bundle.

Collenchyma

Living tissues which have an elongated shape and thick cell wall in the corner. Collenchyma tissue can be located in the leaf stalks, below the epidermis, etc.

Epithelial tissues

Epithelial tissues are covering or protective tissues in the animal body. Almost all organs and cavities are covered by Epithelium.

2. Find out incorrect sentence

(a) Parenchymatous tissues have intercellular spaces

(b) Collenchymatous tissues are irregularly thickened at corners

(c) Apical and intercalary meristems are permanent tissues

(d) Meristematic tissues, in its early stage, lack vacuoles

Soln:

Answer is (a) Parenchymatous tissues have intercellular spaces

Explanation:

Parenchymatous tissues have intercellular spaces is a wrong statement. Parenchyma act as a packing tissue in plants hence they do not have intercellular spaces. Collenchymatous tissues have intercellular spaces.

Explanation:

folllow me n thank my answer