Structural Organisation in Animals — Important Questions
51 questions
With answersCBSE format
SUMMARY: The chapter "Structural Organisation in Animals" focuses on the study of the structure and functions of animal tissues and organs, highlighting the complexity of animal bodies. KEY TOPICS: Animal tissues, epithelial tissue, connective tissue, muscular tissue, nervous tissue, organ and organ systems, earthworm anatomy, cockroach anatomy, frog anatomy, histology.
Which organ in the frog is responsible for filtering blood and producing urine?
AHeart
BLiver
CKidney
DLungs
Check answerHide answer
Correct answer: Option 3 — Kidney
Short Answer Questions10 questions
Q163 Marks
Differentiate between simple epithelium and compound epithelium.
Q173 Marks
Mention three differences between cardiac and skeletal muscles.
Q183 Marks
Explain the digestive system of an earthworm in brief.
Q193 Marks
Describe the structure of a neuron with a diagram.
Q203 Marks
List three differences between an open and closed circulatory system.
Q213 Marks
What are the main functions of epithelial tissue in animals?
View sample solutionHide solution
Epithelial tissue serves several functions including protection, absorption, secretion, and sensation. It forms the outer layer of skin, lines cavities and organs, and plays a role in the exchange of substances.
Q223 Marks
Describe the structure and function of adipose tissue.
View sample solutionHide solution
Adipose tissue is composed of adipocytes (fat cells) that store energy in the form of fat. It provides insulation, cushioning for organs, and serves as an energy reserve.
Q233 Marks
What are the types of connective tissue and their primary functions?
View sample solutionHide solution
Connective tissue types include loose connective tissue, dense connective tissue, adipose tissue, blood, bone, and cartilage. Their primary functions are to support, bind, and protect other tissues and organs.
Q243 Marks
Explain the role of smooth muscle tissue in the human body.
View sample solutionHide solution
Smooth muscle tissue is involuntary and found in the walls of hollow organs such as the intestines and blood vessels. It facilitates movements such as peristalsis and regulates blood flow by contracting and relaxing.
Q253 Marks
What is the significance of the extracellular matrix in connective tissue?
View sample solutionHide solution
The extracellular matrix provides structural and biochemical support to surrounding cells. It plays a critical role in tissue strength, elasticity, and cell signaling.
Long Answer Questions6 questions
Q266 Marks
Describe the morphology and digestive system of cockroach with diagrams.
Q276 Marks
Explain the various types of epithelial tissues with examples and functions.
Q286 Marks
Discuss the digestive system of a frog with a labelled diagram.
Q296 Marks
Compare and contrast the male and female reproductive systems of frog.
Q306 Marks
Describe the structure and types of connective tissues with examples.
Q316 Marks
Differentiate between striated, smooth and cardiac muscles in tabular form.
Assertion–Reason Questions8 questions
Q321 Mark
Assertion (A): Frogs are cold-blooded amphibians.
Reason (R): They cannot regulate their body temperature internally.
Show explanationHide explanation
Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q331 Mark
Assertion (A): Cockroach has an open circulatory system.
Reason (R): Blood flows in haemocoel and bathes the organs directly.
Show explanationHide explanation
Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q341 Mark
Assertion (A): Earthworm is a hermaphrodite.
Reason (R): A single individual contains both male and female reproductive organs.
Show explanationHide explanation
Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q351 Mark
Assertion (A): Cardiac muscles are involuntary.
Reason (R): They contract and relax rhythmically without conscious control.
Show explanationHide explanation
Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q361 Mark
Assertion (A): Adipose tissue stores fat in animals.
Reason (R): It is a type of loose connective tissue.
Show explanationHide explanation
Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q371 Mark
Assertion (A): Epithelial tissue is avascular and relies on diffusion for nutrient supply.
Reason (R): Epithelial tissues do not contain blood vessels and are nourished by the underlying connective tissue.
Show explanationHide explanation
Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Q381 Mark
Assertion (A): Connective tissue is primarily responsible for movement in the body.
Reason (R): Muscular tissue is primarily responsible for movement, while connective tissue supports and binds other tissues.
Show explanationHide explanation
Correct answer: Option 3 —
A is true, but R is false.
Q391 Mark
Assertion (A): Nervous tissue is composed of neurons and glial cells.
Reason (R): Neurons are the functional units of nervous tissue, while glial cells provide support and protection.
Show explanationHide explanation
Correct answer: Option 1 —
Both A and R are true, and R is the correct explanation of A.
Statement-Based Questions8 questions
Q401 Mark
Statement 1: Squamous epithelium has flat, scale-like cells.
Statement 2: It lines the inner surface of blood vessels and air sacs of lungs.
Show answerHide answer
Correct answer: Option 1 —
Both statements are true.
Q411 Mark
Statement 1: Earthworm has segmented body.
Statement 2: Each segment is separated by a septum internally.
Show answerHide answer
Correct answer: Option 1 —
Both statements are true.
Q421 Mark
Statement 1: Cockroach has biting and chewing type mouth parts.
Statement 2: They feed on a variety of organic matter.
Show answerHide answer
Correct answer: Option 1 —
Both statements are true.
Q431 Mark
Statement 1: Frog can absorb oxygen through skin.
Statement 2: This is called cutaneous respiration.
Show answerHide answer
Correct answer: Option 1 —
Both statements are true.
Q441 Mark
Statement 1: Bone is a connective tissue.
Statement 2: Its matrix is rich in calcium salts and collagen fibres.
Show answerHide answer
Correct answer: Option 1 —
Both statements are true.
Q451 Mark
Statement 1: Epithelial tissue is responsible for the secretion of hormones.
Statement 2: Connective tissue provides support and binds other tissues together.
Show answerHide answer
Correct answer: Option 1 —
Both statements are true.
Q461 Mark
Statement 1: Muscular tissue is involved in voluntary and involuntary movements.
Statement 2: Nervous tissue is primarily responsible for the transport of nutrients.
Show answerHide answer
Correct answer: Option 3 —
Only Statement 2 is true.
Q471 Mark
Statement 1: The earthworm's body is divided into segments, each with similar structures.
Statement 2: The cockroach's exoskeleton is made of chitin.
Show answerHide answer
Correct answer: Option 1 —
Both statements are true.
Case Study / Passage Questions2 questions
Q483 Marks
During a virtual dissection class students study the internal anatomy of a frog. They identify the three-chambered heart with two atria and one ventricle, the lungs that supplement skin respiration, and a male reproductive system with two testes that release sperms via vasa efferentia into the kidneys. They compare these features with mammals.
The number of chambers in a frog's heart is:
ATwo
BThree
CFour
DFive
Adult frogs respire through:
ASkin only
BLungs only
CSkin and lungs both
DGills only
Discuss the adaptations of frogs for amphibious life with reference to respiration and circulation.
Show answersHide answers
1. Option 2 — Three
2. Option 3 — Skin and lungs both
3. Frogs are amphibians and show several adaptations for life in two habitats. The skin is moist and richly vascularised allowing cutaneous respiration. The three-chambered heart causes some mixing of oxygenated and deoxygenated blood unlike the four-chambered mammalian heart. Frogs are cold-blooded and undergo external fertilisation in water.
Q493 Marks
A research scholar studies the feeding behaviour of cockroaches infesting a kitchen. She isolates the mouth parts and identifies the labrum, mandibles, maxillae and labium. She concludes that the cockroach has biting and chewing type mouth parts that allow it to feed on a variety of organic matter.
The mouth parts of cockroach are of which type?
ASucking
BPiercing and sucking
CBiting and chewing
DSponging
The circulatory system of cockroach is:
AOpen
BClosed
CBoth
D
Describe the digestive system of cockroach in brief.
Show answersHide answers
1. Option 3 — Biting and chewing
2. Option 1 — Open
3. Cockroaches are omnivorous insects with biting and chewing mouth parts and a complete digestive system. Mandibles cut and crush food while maxillae and labium help in handling and tasting. The blood (haemolymph) is colourless and circulates in an open system bathing the body organs directly. Cockroaches breathe through tracheae opening to spiracles.
Table-Based Questions2 questions
Q503 Marks
Study the table of animal tissues and answer the questions:
Tissue
Function
Example location
Squamous epithelium
Diffusion and protection
Lining of blood vessels
Cuboidal epithelium
Secretion and absorption
Kidney tubules
Striated muscle
Voluntary movement
Skeletal muscles
Cardiac muscle
Pumping of heart
Heart wall
Nervous tissue
Conduction of impulses
Brain and nerves
The lining of blood vessels is composed of:
ASquamous
BCuboidal
CStriated muscle
DCardiac muscle
The muscle of the heart that contracts rhythmically without fatigue is:
ASkeletal muscle
BSmooth muscle
CCardiac muscle
DStriated muscle
Compare striated and cardiac muscles based on structure and location.
Show answersHide answers
1. Option 1 — Squamous
2. Option 3 — Cardiac muscle
3. Animal tissues are of four major types — epithelial, connective, muscular and nervous. Epithelial tissues line and protect surfaces. Connective tissues bind and support organs. Muscular tissues are responsible for movement. Nervous tissue conducts impulses and coordinates body activities. Each tissue type has cells specialised in shape and function.
Q516 Marks
Identify each animal tissue type and its location.
