Structural Organisation in Animals MCQ. These 100 Multiple Choice Questions with Answer and Explanation will help you score full marks in your class 11 Biology exam.
Structural Organisation in Animals MCQ
1. Introduction to Structural Organisation in Animals (MCQ 1 to 5)
2. Tissues in Animals (MCQ 6 to 15)
3. Organ and Organ System Organisation (MCQ 16 to 25)
4. Morphology and Anatomy of Frog (Rana tigrina) (MCQ 26 to 85)
Introduction to Frogs (MCQ 26 to 35)
Introduction to Frogs (MCQ 31 to 35)
External Morphology (MCQ 36 to 45)
Internal Anatomy (MCQ 46 to 85)
Digestive System (MCQ 46 to 53)
Respiratory System (MCQ 54 to 59)Circulatory System (MCQ 60 to 67)
Excretory System (MCQ 68 to 73)
Nervous System (MCQ 74 to 79)
Reproductive System (MCQ 80 to 85)
5. Ecological Importance of Frogs (MCQ 86 to 100)
6. Quick Revision Table
Topic Concepts Introduction to Structural Organisation in Animals – Unicellular organisms perform all functions with one cell, while multicellular organisms use specialized cells. – Levels of organization: cells, tissues, organs, and organ systems. – Division of labour ensures survival and efficiency. Tissues in Animals – Epithelial Tissue: Covers body surfaces and lines cavities. – Connective Tissue: Supports and binds other tissues (e.g., blood, bone). – Muscular Tissue: Enables movement (e.g., skeletal, smooth). – Neural Tissue: Transmits electrical impulses. Organ and Organ System Organisation – Organ Formation: Tissues combine in specific patterns to form organs. – Organ Systems: Multiple organs interact to perform complex functions (e.g., digestive, respiratory). – Evolutionary trend towards increased complexity in systems. Morphology and Anatomy of Frog (Rana tigrina) – Introduction: Amphibia class, cold-blooded, adapt to varying temperatures, exhibit mimicry. – External Morphology: Head and trunk, mucus-covered skin, limbs for movement, sexual dimorphism (vocal sacs in males). – Internal Anatomy: Body cavity holds systems: digestive, respiratory, circulatory, nervous, excretory, reproductive. Digestive System of Frog – Alimentary Canal: Mouth, pharynx, esophagus, stomach, intestine, cloaca. – Digestive Glands: Liver (bile production), pancreas (digestive enzymes). – Digestion: Nutrients absorbed in intestine; undigested waste exits through cloaca. Respiratory System of Frog – Aquatic Respiration: Cutaneous (through skin in water). – Terrestrial Respiration: Pulmonary (lungs), buccal cavity involvement. – Respiratory adaptations: Lungs used on land, skin in water, enabling respiration across environments. Circulatory System of Frog – Heart: Three-chambered (two atria, one ventricle), pericardium covers heart. – Blood and Lymph: Contains RBCs (with hemoglobin), WBCs, platelets. – Portal Systems: Hepatic (liver) and renal (kidney) for nutrient and waste management. Excretory System of Frog – Kidneys: Bean-shaped, filter nitrogenous waste as urea. – Ureters: Transport urine to cloaca, where it exits. – Ureotelic Excretion: Efficiently conserves water, suited for amphibious lifestyle. Nervous System of Frog – Brain: Divided into forebrain (cerebrum), midbrain (optic lobes), and hindbrain (cerebellum, medulla). – Peripheral and Autonomic Systems: Control voluntary and involuntary functions. – Sensory Organs: Eyes, tympanum (for hearing), taste buds, nasal epithelium. Reproductive System of Frog – Male Organs: Testes, vasa efferentia, cloaca. – Female Organs: Ovaries, oviducts, cloaca. – Reproduction: External fertilization, development through tadpole stage, metamorphosis to adult frog. Ecological Importance of Frogs – Pest Control: Consume insects, aiding agriculture. – Food Chain Role: Important prey and predator within ecosystems. – Environmental Indicators: Sensitive to habitat changes, signifying ecological health.
7. Most Asked Questions: Structural Organisation in Animals
What are the main types of tissues in animals?
Animals have four primary tissue types: epithelial, connective, muscular, and neural.
How do frogs adapt to varying environmental temperatures?
Frogs are poikilothermic, meaning their body temperature varies with the environment, and they undergo aestivation in summer and hibernation in winter.
What is the function of the cloaca in frogs?
The cloaca is a common exit chamber for the digestive, excretory, and reproductive systems.
How do frogs respire in water and on land?
Frogs use their skin for respiration in water (cutaneous respiration) and their lungs for respiration on land (pulmonary respiration).
Why are frogs important for ecosystems?
Frogs control insect populations, act as food for other species, and serve as indicators of environmental health.
Circulatory System (MCQ 60 to 67)
Excretory System (MCQ 68 to 73)
Nervous System (MCQ 74 to 79)
Reproductive System (MCQ 80 to 85)
5. Ecological Importance of Frogs (MCQ 86 to 100)
6. Quick Revision Table
Topic Concepts Introduction to Structural Organisation in Animals – Unicellular organisms perform all functions with one cell, while multicellular organisms use specialized cells. – Levels of organization: cells, tissues, organs, and organ systems. – Division of labour ensures survival and efficiency. Tissues in Animals – Epithelial Tissue: Covers body surfaces and lines cavities. – Connective Tissue: Supports and binds other tissues (e.g., blood, bone). – Muscular Tissue: Enables movement (e.g., skeletal, smooth). – Neural Tissue: Transmits electrical impulses. Organ and Organ System Organisation – Organ Formation: Tissues combine in specific patterns to form organs. – Organ Systems: Multiple organs interact to perform complex functions (e.g., digestive, respiratory). – Evolutionary trend towards increased complexity in systems. Morphology and Anatomy of Frog (Rana tigrina) – Introduction: Amphibia class, cold-blooded, adapt to varying temperatures, exhibit mimicry. – External Morphology: Head and trunk, mucus-covered skin, limbs for movement, sexual dimorphism (vocal sacs in males). – Internal Anatomy: Body cavity holds systems: digestive, respiratory, circulatory, nervous, excretory, reproductive. Digestive System of Frog – Alimentary Canal: Mouth, pharynx, esophagus, stomach, intestine, cloaca. – Digestive Glands: Liver (bile production), pancreas (digestive enzymes). – Digestion: Nutrients absorbed in intestine; undigested waste exits through cloaca. Respiratory System of Frog – Aquatic Respiration: Cutaneous (through skin in water). – Terrestrial Respiration: Pulmonary (lungs), buccal cavity involvement. – Respiratory adaptations: Lungs used on land, skin in water, enabling respiration across environments. Circulatory System of Frog – Heart: Three-chambered (two atria, one ventricle), pericardium covers heart. – Blood and Lymph: Contains RBCs (with hemoglobin), WBCs, platelets. – Portal Systems: Hepatic (liver) and renal (kidney) for nutrient and waste management. Excretory System of Frog – Kidneys: Bean-shaped, filter nitrogenous waste as urea. – Ureters: Transport urine to cloaca, where it exits. – Ureotelic Excretion: Efficiently conserves water, suited for amphibious lifestyle. Nervous System of Frog – Brain: Divided into forebrain (cerebrum), midbrain (optic lobes), and hindbrain (cerebellum, medulla). – Peripheral and Autonomic Systems: Control voluntary and involuntary functions. – Sensory Organs: Eyes, tympanum (for hearing), taste buds, nasal epithelium. Reproductive System of Frog – Male Organs: Testes, vasa efferentia, cloaca. – Female Organs: Ovaries, oviducts, cloaca. – Reproduction: External fertilization, development through tadpole stage, metamorphosis to adult frog. Ecological Importance of Frogs – Pest Control: Consume insects, aiding agriculture. – Food Chain Role: Important prey and predator within ecosystems. – Environmental Indicators: Sensitive to habitat changes, signifying ecological health.
7. Most Asked Questions: Structural Organisation in Animals
What are the main types of tissues in animals?
Animals have four primary tissue types: epithelial, connective, muscular, and neural.
How do frogs adapt to varying environmental temperatures?
Frogs are poikilothermic, meaning their body temperature varies with the environment, and they undergo aestivation in summer and hibernation in winter.
What is the function of the cloaca in frogs?
The cloaca is a common exit chamber for the digestive, excretory, and reproductive systems.
How do frogs respire in water and on land?
Frogs use their skin for respiration in water (cutaneous respiration) and their lungs for respiration on land (pulmonary respiration).
Why are frogs important for ecosystems?
Frogs control insect populations, act as food for other species, and serve as indicators of environmental health.
Nervous System (MCQ 74 to 79)
Reproductive System (MCQ 80 to 85)
5. Ecological Importance of Frogs (MCQ 86 to 100)
6. Quick Revision Table
Topic Concepts Introduction to Structural Organisation in Animals – Unicellular organisms perform all functions with one cell, while multicellular organisms use specialized cells. – Levels of organization: cells, tissues, organs, and organ systems. – Division of labour ensures survival and efficiency. Tissues in Animals – Epithelial Tissue: Covers body surfaces and lines cavities. – Connective Tissue: Supports and binds other tissues (e.g., blood, bone). – Muscular Tissue: Enables movement (e.g., skeletal, smooth). – Neural Tissue: Transmits electrical impulses. Organ and Organ System Organisation – Organ Formation: Tissues combine in specific patterns to form organs. – Organ Systems: Multiple organs interact to perform complex functions (e.g., digestive, respiratory). – Evolutionary trend towards increased complexity in systems. Morphology and Anatomy of Frog (Rana tigrina) – Introduction: Amphibia class, cold-blooded, adapt to varying temperatures, exhibit mimicry. – External Morphology: Head and trunk, mucus-covered skin, limbs for movement, sexual dimorphism (vocal sacs in males). – Internal Anatomy: Body cavity holds systems: digestive, respiratory, circulatory, nervous, excretory, reproductive. Digestive System of Frog – Alimentary Canal: Mouth, pharynx, esophagus, stomach, intestine, cloaca. – Digestive Glands: Liver (bile production), pancreas (digestive enzymes). – Digestion: Nutrients absorbed in intestine; undigested waste exits through cloaca. Respiratory System of Frog – Aquatic Respiration: Cutaneous (through skin in water). – Terrestrial Respiration: Pulmonary (lungs), buccal cavity involvement. – Respiratory adaptations: Lungs used on land, skin in water, enabling respiration across environments. Circulatory System of Frog – Heart: Three-chambered (two atria, one ventricle), pericardium covers heart. – Blood and Lymph: Contains RBCs (with hemoglobin), WBCs, platelets. – Portal Systems: Hepatic (liver) and renal (kidney) for nutrient and waste management. Excretory System of Frog – Kidneys: Bean-shaped, filter nitrogenous waste as urea. – Ureters: Transport urine to cloaca, where it exits. – Ureotelic Excretion: Efficiently conserves water, suited for amphibious lifestyle. Nervous System of Frog – Brain: Divided into forebrain (cerebrum), midbrain (optic lobes), and hindbrain (cerebellum, medulla). – Peripheral and Autonomic Systems: Control voluntary and involuntary functions. – Sensory Organs: Eyes, tympanum (for hearing), taste buds, nasal epithelium. Reproductive System of Frog – Male Organs: Testes, vasa efferentia, cloaca. – Female Organs: Ovaries, oviducts, cloaca. – Reproduction: External fertilization, development through tadpole stage, metamorphosis to adult frog. Ecological Importance of Frogs – Pest Control: Consume insects, aiding agriculture. – Food Chain Role: Important prey and predator within ecosystems. – Environmental Indicators: Sensitive to habitat changes, signifying ecological health.
7. Most Asked Questions: Structural Organisation in Animals
What are the main types of tissues in animals?
Animals have four primary tissue types: epithelial, connective, muscular, and neural.
How do frogs adapt to varying environmental temperatures?
Frogs are poikilothermic, meaning their body temperature varies with the environment, and they undergo aestivation in summer and hibernation in winter.
What is the function of the cloaca in frogs?
The cloaca is a common exit chamber for the digestive, excretory, and reproductive systems.
How do frogs respire in water and on land?
Frogs use their skin for respiration in water (cutaneous respiration) and their lungs for respiration on land (pulmonary respiration).
Why are frogs important for ecosystems?
Frogs control insect populations, act as food for other species, and serve as indicators of environmental health.
5. Ecological Importance of Frogs (MCQ 86 to 100)
6. Quick Revision Table
| Topic | Concepts |
| Introduction to Structural Organisation in Animals | – Unicellular organisms perform all functions with one cell, while multicellular organisms use specialized cells. – Levels of organization: cells, tissues, organs, and organ systems. – Division of labour ensures survival and efficiency. |
| Tissues in Animals | – Epithelial Tissue: Covers body surfaces and lines cavities. – Connective Tissue: Supports and binds other tissues (e.g., blood, bone). – Muscular Tissue: Enables movement (e.g., skeletal, smooth). – Neural Tissue: Transmits electrical impulses. |
| Organ and Organ System Organisation | – Organ Formation: Tissues combine in specific patterns to form organs. – Organ Systems: Multiple organs interact to perform complex functions (e.g., digestive, respiratory). – Evolutionary trend towards increased complexity in systems. |
| Morphology and Anatomy of Frog (Rana tigrina) | – Introduction: Amphibia class, cold-blooded, adapt to varying temperatures, exhibit mimicry. – External Morphology: Head and trunk, mucus-covered skin, limbs for movement, sexual dimorphism (vocal sacs in males). – Internal Anatomy: Body cavity holds systems: digestive, respiratory, circulatory, nervous, excretory, reproductive. |
| Digestive System of Frog | – Alimentary Canal: Mouth, pharynx, esophagus, stomach, intestine, cloaca. – Digestive Glands: Liver (bile production), pancreas (digestive enzymes). – Digestion: Nutrients absorbed in intestine; undigested waste exits through cloaca. |
| Respiratory System of Frog | – Aquatic Respiration: Cutaneous (through skin in water). – Terrestrial Respiration: Pulmonary (lungs), buccal cavity involvement. – Respiratory adaptations: Lungs used on land, skin in water, enabling respiration across environments. |
| Circulatory System of Frog | – Heart: Three-chambered (two atria, one ventricle), pericardium covers heart. – Blood and Lymph: Contains RBCs (with hemoglobin), WBCs, platelets. – Portal Systems: Hepatic (liver) and renal (kidney) for nutrient and waste management. |
| Excretory System of Frog | – Kidneys: Bean-shaped, filter nitrogenous waste as urea. – Ureters: Transport urine to cloaca, where it exits. – Ureotelic Excretion: Efficiently conserves water, suited for amphibious lifestyle. |
| Nervous System of Frog | – Brain: Divided into forebrain (cerebrum), midbrain (optic lobes), and hindbrain (cerebellum, medulla). – Peripheral and Autonomic Systems: Control voluntary and involuntary functions. – Sensory Organs: Eyes, tympanum (for hearing), taste buds, nasal epithelium. |
| Reproductive System of Frog | – Male Organs: Testes, vasa efferentia, cloaca. – Female Organs: Ovaries, oviducts, cloaca. – Reproduction: External fertilization, development through tadpole stage, metamorphosis to adult frog. |
| Ecological Importance of Frogs | – Pest Control: Consume insects, aiding agriculture. – Food Chain Role: Important prey and predator within ecosystems. – Environmental Indicators: Sensitive to habitat changes, signifying ecological health. |
7. Most Asked Questions: Structural Organisation in Animals
What are the main types of tissues in animals?
Animals have four primary tissue types: epithelial, connective, muscular, and neural.
How do frogs adapt to varying environmental temperatures?
Frogs are poikilothermic, meaning their body temperature varies with the environment, and they undergo aestivation in summer and hibernation in winter.
What is the function of the cloaca in frogs?
The cloaca is a common exit chamber for the digestive, excretory, and reproductive systems.
How do frogs respire in water and on land?
Frogs use their skin for respiration in water (cutaneous respiration) and their lungs for respiration on land (pulmonary respiration).
Why are frogs important for ecosystems?
Frogs control insect populations, act as food for other species, and serve as indicators of environmental health.
