SUMMARY: The chapter "Tissues" in Class 9 Science explores the different types of tissues in plants and animals, their structure, functions, and significance in living organisms. KEY TOPICS: plant tissues, animal tissues, meristematic tissue, permanent tissue, epithelial tissue, connective tissue, muscular tissue, nervous tissue, functions of tissues, tissue organization
Which type of permanent tissue is responsible for photosynthesis in plants?
ASclerenchyma
BCollenchyma
CParenchyma
DXylem
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Correct answer: Option 3 — Parenchyma
Q141 Mark
Which type of connective tissue connects muscles to bones?
ACartilage
BTendons
CLigaments
DAdipose tissue
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Correct answer: Option 2 — Tendons
Q151 Mark
What is the role of xylem in vascular plants?
ATransport of food
BTransport of water and minerals
CStorage of nutrients
DProtection against pathogens
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Correct answer: Option 2 — Transport of water and minerals
Short Answer Questions10 questions
Q163 Marks
What are the main types of plant tissues and their functions?
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The main types of plant tissues are meristematic and permanent tissues. Meristematic tissues are responsible for growth, while permanent tissues provide support, storage, and photosynthesis functions.
Q173 Marks
Describe the characteristics of meristematic tissue.
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Meristematic tissue consists of undifferentiated cells that can divide continuously. These cells are usually small, have thin cell walls, and are located in regions of active growth such as the tips of roots and shoots.
Q183 Marks
What is the difference between simple and complex permanent tissues in plants?
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Simple permanent tissues consist of one type of cell, such as parenchyma, collenchyma, and sclerenchyma, while complex permanent tissues are made up of more than one type of cell, such as xylem and phloem, which work together to perform specific functions.
Q193 Marks
Explain the role of epithelial tissue in animals. Provide examples.
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Epithelial tissue serves as a protective layer covering body surfaces and lining cavities. Examples include skin epithelium, which protects against pathogens, and intestinal epithelium, which aids in absorption.
Q203 Marks
What are the different types of connective tissues in animals?
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Connective tissues in animals include loose connective tissue, dense connective tissue, adipose tissue, blood, bone, and cartilage. Each type has specific functions such as support, storage, and transport.
Q213 Marks
Describe muscular tissue and its types. What is its primary function?
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Muscular tissue is responsible for movement in the body and is classified into three types: skeletal, cardiac, and smooth muscle. Skeletal muscle is voluntary, cardiac muscle is involuntary and striated, while smooth muscle is involuntary and non-striated.
Q223 Marks
What is the function of nervous tissue in animals?
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Nervous tissue is responsible for transmitting signals throughout the body. It consists of neurons, which carry impulses, and glial cells, which support and protect neurons.
Q233 Marks
How do xylem and phloem differ in their functions?
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Xylem is responsible for the transport of water and minerals from roots to other parts of the plant, while phloem transports food and nutrients produced during photosynthesis from leaves to other parts of the plant.
Q243 Marks
What is the significance of parenchyma tissue in plants?
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Parenchyma tissue is significant for its role in storage, photosynthesis, and tissue repair. It is the most common type of plant tissue and can also help in the healing process of wounds.
Q253 Marks
Define sclerenchyma and its role in plants.
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Sclerenchyma is a type of permanent tissue that provides structural support to plants. It consists of thick-walled cells that are usually dead at maturity, helping to strengthen and protect plant organs.
Long Answer Questions6 questions
Q266 Marks
Describe the structure and function of meristematic tissue in plants. How does it differ from permanent tissue?
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Meristematic tissue is composed of undifferentiated cells that are capable of continuous division. These cells are typically small, with thin cell walls and a large nucleus. The primary function of meristematic tissue is to facilitate growth in plants, as it is responsible for the formation of new cells. In contrast, permanent tissue consists of differentiated cells that have specific functions and do not divide. Permanent tissues can be further classified into simple and complex tissues, such as parenchyma, collenchyma, and sclerenchyma, each serving distinct roles in the plant's structure and function.
Q276 Marks
Explain the different types of permanent tissues in plants and their specific functions.
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Permanent tissues in plants can be classified into simple and complex tissues. Simple tissues include parenchyma, collenchyma, and sclerenchyma. Parenchyma is involved in storage, photosynthesis, and tissue repair; collenchyma provides flexibility and support to young stems and leaves; sclerenchyma offers strength and rigidity due to its thick cell walls. Complex tissues include xylem and phloem, which are responsible for the transport of water, minerals, and nutrients throughout the plant. Xylem conducts water from roots to leaves, while phloem transports food produced during photosynthesis to various parts of the plant.
Q286 Marks
What are the main types of animal tissues? Describe the structure and function of each type.
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Animal tissues are categorized into four main types: epithelial, connective, muscular, and nervous tissues. Epithelial tissue covers body surfaces and lines cavities, providing protection, absorption, and secretion. Connective tissue supports and binds other tissues; it includes bone, blood, and adipose tissue, each with unique functions such as structural support and nutrient transport. Muscular tissue is responsible for movement and is divided into three types: skeletal (voluntary movement), cardiac (involuntary movement of the heart), and smooth (involuntary movement in organs). Nervous tissue is involved in the transmission of signals throughout the body, consisting of neurons and supporting glial cells.
Q296 Marks
Discuss the role of epithelial tissue in the human body and its various types.
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Epithelial tissue plays a crucial role in the human body by forming protective barriers, facilitating absorption, secretion, and sensation. It is classified into several types based on cell shape and arrangement: simple squamous epithelium (thin and flat, found in alveoli for gas exchange), cuboidal epithelium (cube-shaped, involved in secretion and absorption in glands), and columnar epithelium (tall and column-like, found in the digestive tract for absorption). Additionally, stratified epithelium consists of multiple layers, providing protection in areas subject to abrasion, such as the skin. Each type of epithelial tissue is specialized for its specific function, contributing to overall homeostasis.
Q306 Marks
Explain the significance of connective tissue in the human body and identify its major types.
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Connective tissue is vital for providing structural support, connecting different tissues, and facilitating transport within the body. Major types of connective tissue include loose connective tissue (which supports organs and blood vessels), dense connective tissue (which forms tendons and ligaments), adipose tissue (which stores fat and insulates the body), cartilage (which provides flexible support in joints), and bone (which provides rigid support and protection). Blood, a fluid connective tissue, plays a critical role in transporting oxygen, nutrients, and waste products. Each type of connective tissue has unique properties and functions that contribute to the body's overall integrity and function.
Q316 Marks
Describe the structure and function of muscular tissue. What are the differences between the three types of muscular tissue?
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Muscular tissue is specialized for contraction and movement, and it is classified into three types: skeletal, cardiac, and smooth muscle. Skeletal muscle is striated and under voluntary control, allowing for movement of bones and posture maintenance. Cardiac muscle is also striated but is involuntary, found only in the heart, and responsible for pumping blood. Smooth muscle is non-striated and involuntary, located in the walls of hollow organs such as the intestines and blood vessels, facilitating movements like peristalsis and vasoconstriction. Each type of muscular tissue has distinct structural characteristics and functions that enable various movements in the body.
Assertion–Reason Questions8 questions
Q321 Mark
Assertion (A): Meristematic tissue is responsible for the growth of plants.
Reason (R): Meristematic tissue consists of undifferentiated cells that can divide and form new cells.
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Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q331 Mark
Assertion (A): Epithelial tissue is involved in the transportation of substances.
Reason (R): Epithelial tissue forms protective layers on body surfaces and does not have blood vessels.
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Correct answer: Option 4 —
A is false, but R is true.
Q341 Mark
Assertion (A): Connective tissue connects different parts of the body.
Reason (R): Connective tissue includes blood, which is a type of epithelial tissue.
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Correct answer: Option 3 —
A is true, but R is false.
Q351 Mark
Assertion (A): Muscular tissue is responsible for movement in animals.
Reason (R): Muscular tissue is made up of cells that can contract and relax.
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Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q361 Mark
Assertion (A): Permanent tissues are formed from meristematic tissues.
Reason (R): Permanent tissues are differentiated and do not divide further.
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Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q371 Mark
Assertion (A): Nervous tissue is responsible for transmitting impulses in the body.
Reason (R): Nervous tissue is made up of neurons and glial cells that support them.
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Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q381 Mark
Assertion (A): Parenchyma is a type of permanent tissue that is involved in storage.
Reason (R): Parenchyma cells are typically thin-walled and can store food and water.
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Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q391 Mark
Assertion (A): Xylem is responsible for transporting nutrients in plants.
Reason (R): Xylem primarily transports water and minerals from roots to other parts of the plant.
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Correct answer: Option 3 —
A is true, but R is false.
Statement-Based Questions8 questions
Q401 Mark
Statement 1: Meristematic tissue is responsible for the growth of plants.
Statement 2: Permanent tissue is involved in the active division of cells.
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Correct answer: Option 2 —
Only Statement 1 is true.
Q411 Mark
Statement 1: Epithelial tissue covers the body surfaces and lines cavities.
Statement 2: Connective tissue is primarily responsible for movement in the body.
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Correct answer: Option 3 —
Only Statement 2 is true.
Q421 Mark
Statement 1: Xylem is a type of permanent tissue that transports water in plants.
Statement 2: Phloem is responsible for the transport of nutrients and food.
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Correct answer: Option 1 —
Both statements are true.
Q431 Mark
Statement 1: Muscular tissue is divided into three types: skeletal, cardiac, and smooth.
Statement 2: Nervous tissue is responsible for the transmission of impulses.
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Correct answer: Option 1 —
Both statements are true.
Q441 Mark
Statement 1: Parenchyma is a type of meristematic tissue.
Statement 2: Collenchyma provides flexibility and support to plant organs.
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Correct answer: Option 3 —
Only Statement 2 is true.
Q451 Mark
Statement 1: Connective tissue includes blood, bone, and adipose tissue.
Statement 2: Epithelial tissue is not involved in secretion and absorption.
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Correct answer: Option 4 —
Both statements are false.
Q461 Mark
Statement 1: Sclerenchyma is a type of permanent tissue that provides strength to plants.
Statement 2: Meristematic tissue is found only in the roots of plants.
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Correct answer: Option 2 —
Only Statement 1 is true.
Q471 Mark
Statement 1: Smooth muscle is involuntary and found in the walls of internal organs.
Statement 2: Skeletal muscle is under voluntary control.
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Correct answer: Option 1 —
Both statements are true.
