"AKC SCIENCE CLASSES"
CLASS 09 TH (CBSE AND MP BOARD)
CHAPTER 06
TISSUES
INTEXT QUESTIONS AND ANSWERS
NCERT INTEXT QUESTIONS (PAGE NO. 69)
Q.01:- What is a tissue?
Ans:- Tissue is a group of related cells that have a common origin and perform a common function.
Q.02:- What is the utility of tissues in multicellular organisms?
Ans:- (Ñ–) Division of Labour :- Tissues bring about division of labour in multicellular organisms. It increases efficiently.
(ⅱ) Higher Organisation :- Tissues become organised to form organs and organ systems.
(ⅲ) Individual Cells :- Work load of individual cells has decreased.
(ⅳ) Higher Survival :- Because of division of labour, higher efficiency and organization, the multicellular organisms have high survival.
NCERT INTEXT QUESTIONS (PAGE NO. 74)
Q.03:- Name types of simple tissues.
Ans:- Three一 parenchyma, collenchyma and sclerenchyma. (Meristematic tissue is also a simple tissue).
Q.04:- Where is apical meristem found?
Ans:- Apical meristem occurs at root and stem tips.
Q.05:- Which tissue make up the husk of coconut?
Ans:- Sclerenchyma
Q.06:- What are the constituents of phloem?
Ans:- Sieve tubes, companion cells, phloem parenchyma and phloem fibers.
NCERT INTEXT QUESTIONS (PAGE NO. 78)
Q.07:- Name the tissue responsible for movement of our body.
Ans:- Muscular tissue.
Q.08:- What does a neutron look-like?
Ans:- A miniature tree with thin hair like parts arising from its ends.
Q.09:- Give three features of cardiac muscles.
Ans:- (i) Cells/Fibers :- They are small, cylindrical, uninucleate striated with short lateral branches.
(ⅱ) Intercalated Discs :- In the area of union between the two adjacent cardiac muscle fibers, zig-zag junctions called intercalated discs develop. The intercalated discs function as impulse boosters.
(ⅲ) Rhythmic Contractions :- The muscles are involuntary and nonfatigued which continue to contract and relax tirelessly throughout life.
Q.10:- What are the function of areolar tissue?
Ans:- Functions of areolar tissue :-
- The areolar tissue help to hold the organs in the place and act as a packaging tissue.
- The layer of skin or the epithelial tissue is connected with the other tissues like blood vessels with the help of these tissues.
- Repair of damaged tissues.
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