16 public questions tagged with this topic.
Green glands (also called antennal glands) perform excretory functions in crustaceans like prawns.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Nephron Structure - Glomerulus and Bowmans Capsule
Uric acid is the least toxic nitrogenous waste and is excreted in a water-insoluble form.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Modes of Excretion - Ammonotelism Ureotelism Uricotelism
Urea is only partially reabsorbed; most of it is excreted in urine.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Modes of Excretion - Ammonotelism Ureotelism Uricotelism
Urea is only partially reabsorbed by the nephron; most of it is excreted in urine.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Modes of Excretion - Ammonotelism Ureotelism Uricotelism
Uric acid is the least toxic nitrogenous waste and is excreted in a water-insoluble form.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Modes of Excretion - Ammonotelism Ureotelism Uricotelism
Uric acid is the least toxic nitrogenous waste and is excreted as a paste with minimal water loss in birds and reptiles.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Modes of Excretion - Ammonotelism Ureotelism Uricotelism
Frogs have 10 pairs of cranial nerves, which help in controlling sensory and motor functions.
Ref: NCERT Class 11 Biology Chapter 7: Structural Organisation in Animals Frog - Anatomy - Nervous System Sense Organs and Reproductive System
Frogs have well-developed eyes that help them detect movement and depth.
Ref: NCERT Class 11 Biology Chapter 7: Structural Organisation in Animals Frog - Anatomy - Nervous System Sense Organs and Reproductive System
The pancreas produces pancreatic juice, which contains digestive enzymes for breaking down food.
Ref: NCERT Class 11 Biology Chapter 7: Structural Organisation in Animals Frog - Morphology and External Features
Fishes (class Pisces) have a two-chambered heart, consisting of one atrium and one ventricle.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Vertebrata - Aves and Mammalia
Arthropods have an open circulatory system where the blood directly bathes organs in a hemocoel.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Arthropoda
Fish respiration primarily involves branchial gills supported by pharyngeal arches. Each gill arch bears filaments further divided into lamellae containing dense capillary networks. Water flows unidirectionally, driven by buccal-opercular pumping in osteichthyans or ram ventilation, counter to blood flow within lamellae, maximizing oxygen extraction via countercurrent exchange with efficiency exceeding 80%. Lungs are present only in dipnoan lungfishes for air breathing, skin respiration minor, tracheae characteristic of insects. Such branchial adaptation supports active swimming, reflecting aquatic oxygen availability and metabolic demands of ectothermic vertebrates living in water.
Ref: NCERT Class 11 Biology, Chapter 4: Pisces – Gills; Campbell Biology, 12th ed., Chapter 42, Gills
