Question

Tissue lesson10th exercise question

Answer 1

tissue chap of class 9 pls search it on Google

Answer 2

1. Define the term “tissue”.
Ans. It is a group of cells similar in origin and structure and they are specialized to perform a
particular function like muscle cells in our body forms the muscle tissue that brings about
body movements(specific function).

2. How many types of elements together make up the xylem tissue? Name them.
Ans. Xylem tissue is made up of following 4 types of elements:
i) Tracheids
ii) vessels
iii) Xylem fibres
iv) Xylem parenchyma

5. What are the functions of the stomata?
Ans. The functions of stomata are:
i) gaseous exchange like exchange of CO2 and O2
.
ii) Process of transpiration i.e. loss of excess water in the form of water vapour occurs
through stomata.

7. What is the specific function of the cardiac muscle?
Ans. Cardiac muscles are the muscles of heart that pumps blood to all parts of body and the
pumping needs rhythmic contraction and relaxation of cardiac muscles throughout the life without any fatigue.

10. Name the following.
(a) Tissue that forms the inner lining of our mouth.
(b) Tissue that connects muscle to bone in humans.
(c) Tissue that transports food in plants.
(d) Tissue that stores fat in our body.
(e) Connective tissue with a fluid matrix.
(f) Tissue present in the brain.
Ans. (a) epithelial tissue
(b) tendons
(c) phloem
(d) adipose tissue
(e) blood
(f) nerve tissue

12. Name the regions in which parenchyma tissue is present.
Ans. Parenchymatous tissue is present in the epidermis, cortex, pith of the stem, root, leaves,
flowers and fruits of plants.
13. What is the role of epidermis in plants?
Ans. It is a protective layer to the plant parts. It can also absorb water from soil like in the
roots and even allow exchange of gases through stomata. It also helps in preventing the entry of pathogens.

14. How does the cork act as a protective tissue?
Ans. In plants the secondary meristem cuts off many external layers of cells that are dead
and arranged in a compact manner. Such layers together make cork. They have deposition of
suberin which is very hard and impermeable hence protects plants from unfavorable
conditions and microbial attack etc.


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