NCERT Solutions for Class 9 Science Chapter 6

NCERT Solutions for Class 9 Science Chapter 6 Tissues Page 69, Page 74, page 78 and Exercises in English Medium or पेज 77 के उत्तर, पेज 81 के उत्तर, पेज 83 के उत्तर, पेज 87 के उत्तर and अभ्यास के प्रश्न उत्तर in Hindi Medium for 2020-2021.

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NCERT Solutions for Class 9 Science Chapter 6

Class:9
Subject:Science – विज्ञान
Chapter 6:Tissues

9th Science Chapter 6 Answers in English and Hindi Medium

NCERT Solutions for Class 9 Science Chapter 6 Tissues Intext Questions of all Pages and chapter end exercises question answers in updated form are given below for academic session 2020-2021. All the answers are written by experts of Science Subject of High School, if still there is any error, please inform us. Your feedback is the strength of website.




Class 9 Science Chapter 6 Solutions Related Pages

What is a tissue?

Tissue is a group of cells of same kind to perform a particular function.

How are simple tissue different from complex tissue?

Simple tissues are made up of only one type of cells whereas complex tissues are made up of different types of cells.

What is the role of epidermis tissue in the plants?

(i) It is a protective tissue of angiospermic (flowering) plant.
(ii) It is provides protection to the underlying tissues.
(iii) It forms the outer covering of roots, stems, leaves and flowers.
(iv) It prevents entry of micro- organism.

How is carbon fixation takes place in plants?

The process of carbon fixation is done by photosynthesis.

How can we determine age of a tree?

It can be determined by counting annual rings present in the trunk of tree call xylem rings.

What is the specific function of the cardiac muscle?

Cardiac muscle helps the heart to beat throughout the life with its own contraction and relaxation and involuntary nature.

Girth of stem increases due to which type of meristem?

Lateral Meristem.

What are the function of stomata?

(i) Exchange of gases with atmosphere.
(ii) Transpiration (loss of excess of water) in form of water vapours.

Questions for Practice on 9th Science Chapter 6

Question 1:
(a) Name the plant tissue which is found in the husk of a coconut. Identify the chemical which is responsible for its stiffness.
(b) Give one way in which it differs from parenchymatous cells.
Answer 1:
(a) Sclerenchyma fibres, lignin is responsible for its stiffness.
(b) Scelerenchyma are thick walled dead cells while parenchyma are thin walled living cells.

Question 2:
(a) Name the living component which is common in both the complex permanent tissue found in the plants. What is its function?
(b) Give any two ways in which this tissue differs functionally from each other.
Answer 2:
(a) Parenchyma. It takes part in the storage of nutrients and slows down lateral conduction (water in xylem and nutrients in phloem).
(b) Xylem:
(i) Xylem conducts water and minerals.
(ii) Conduction is unidirectional, upwardly from roots to stem tips and leaves.
Phloem:
(i) Phloem conducts food materials.
(ii) It is bidirectional from leaves to roots and from roots to stem tips.



Important Questions on 9th Science Chapter 6

Define the term ‘tissue’?
The group of cells similar in structure that work together to achieve a particular function forms a tissue. This group of cells has a common origin.
बहुकोशिक जीवों में ऊतकों का क्या उपयोग है?
बहुकोशिक जीवों में ऊतक भोजन का पाचन, स्वसन, उत्सर्जन, परिसंचरण, गमन तथा जनन आदि कार्य करते हैं।
How many types of elements together make up the xylem tissue? Name them.
Xylem is a complex tissue. It is made up of following four kinds of cells or elements:
(a) Tracheids
(b) Vessels
(c) Xylem parenchyma
(d) Xylem fibres.
How are simple tissues different from complex tissues in plants?
Simple tissues are made up of one type of cells which coordinate to perform a common function.
Complex tissues are made up of more than one type of cells. All these coordinate to perform a common function.
What are the functions of Stomata?
The small pores present in the epidermis of the leaf are stomata. Stomata are enclosed by two kidney shaped cells called guard cells.
Functions of Stomata
Exchange of gases, particularly CO2 and O2, with atmosphere.
Loss of water in the form of vapour during transpiration.
प्रकाश संश्लेषण के लिए किस गैस की आवश्यकता होती है?
प्रकाश संश्लेषण के लिए कार्बन डाइआक्साइड (CO2) गैस की आवश्यकता होती है।
पौधों में वाष्पोत्सर्जन के कार्यों का उल्लेख करें।
पौधों में वाष्पोत्सर्जन की क्रिया स्टोमेटा के द्वारा होती है। वाष्पोत्सर्जन की क्रिया के कारण ही पौधो को मृदा से पानी तथा पोषक तत्व अवशोषित करने में मदद मिलती है।
प्ररोह का शीर्षस्थ विभज्योतक कहाँ पाया जाता है?
प्ररोह का शीर्षस्थ विभज्योतक जड़, तना तथा शाखाओं के शीर्ष भाग पर पाया जाता है। यह उनकी लंबाई में वृद्धि करता है।
What is the specific function of cardiac muscle?
Cardiac muscles are involuntary muscles which show characteristics of both smooth and striated muscles. These muscles occur in the walls of the heart.
Functions of Cardiac Muscles
Cardiac muscles contract and relax rapidly, rhythmically and tirelessly throughout life. They contract endlessly from early embryonic stage until death.
The contraction and relaxation of heart muscles help to pump and distribute blood to various parts of body.
Name the regions in which parenchyma tissue is present.
Parenchyma is a simple permanent tissue of angiospermic plants. It is present in cortex and pith of stem and roots. It is also present in mesophyll of leaves. When it contains chlorophyll, it is called Chlorenchyma, found in green leaves.
नारियल का रेशा किस ऊतक का बना होता है?
नारियल का रेशा स्क्लेरेंकाइमा ऊतक का बना होता है। यह पौधे को काठोर एवं मजबूत बनाता है।
उस ऊतक का नाम बताएँ जो हमारे शरीर में गति के लिए उत्तरदायी है।
पेशी ऊतक शरीर को गति प्रदान करते है। पेशी ऊतक में एक विशेष प्रकार का प्रोटीन होता है जिसके संकुचन एवं प्रसार के कारण गति होती है।
न्यूरॉन देखने में कैसा लगता है?
न्यूरॉन को तंत्रिका कोशिका कहते हैं। यह एक लंबे तंतु जैसा दिखता है। न्यूरॉन में कोशिकाएँ केंद्रक तथा कोशिकाद्रव्य (साइटोप्लाज्म) होते हैं। इससे लंबे, पतले बालों जैसी शाखाएँ निकली होती हैं। प्रत्येक न्यूरॉन में इस तरह का एक लंबा प्रवर्ध होता है, जिसको एक्सॉन कहते हैं तथा बहुत सारे छोटी शाखा वाले प्रवर्ध (डेंडराइट्स) होते हैं। एक तंत्रिका कोशिका 1 मीटर तक हो सकती है।
एरिओलार ऊतक के क्या कार्य हैं?
एरिओलार ऊतक के कार्य:
यह अंगो के बीच खाली स्थान को भरता है।
आंतरिक अंगो को सहारा देकर चोट और झटकों से बचाता है।
यह ऊतकों की मरम्मत में सहायता करता है।
What is the role of epidermis in plants?
Epidermis is a protective tissue of angiospermic plants. It provides protections to underlying tissues. Epidermis forms outer covering of various plant organs such as roots, stem, leaves, and flowers and remains in direct contact with the environment. Any substance whether solid, liquid or gas can enter into the plant or move outside only after passing through this layer. Epidermis helps in absorption, secretion, gaseous exchange and transpiration. It helps in preventing the entry of pathogens.
How does the cork act as a protective tissue?
The cork cells are dead cells and do not have any intercellular spaces. The cell wall of the cork cells are coated with suberin (a waxy substance). Suberin makes these cells impermeable to water and gases. Cork is protective in function; it protects underlying tissues from desiccation, infection and mechanical injury.

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