Practice questions covering the Phylum Mollusca and Echinodermata, including their key features, classification, and biological significance.
All chordates possess a dorsal hollow nerve cord at some stage of their development.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
Marine bony fishes maintain buoyancy using an air bladder, which helps control their depth in water.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
Echinoderms possess a unique water vascular system, which aids in locomotion, food capture, and respiration.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
The radula is a rasping, file-like structure in mollusks used for scraping and ingesting food.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
Annelids have a closed circulatory system with blood confined to vessels.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
Octopus belongs to phylum Mollusca and is a member of class Cephalopoda.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
The water vascular system in echinoderms helps in locomotion using tube feet and aids in capturing food.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
All chordates possess a dorsal hollow nerve cord at some stage in their development.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
Asterias (starfish) belongs to phylum Echinodermata, which includes marine animals with a water vascular system.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
Asterias (starfish) has a water vascular system, which is a unique feature of phylum Echinodermata.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
Limulus (King Crab) is considered a living fossil due to its primitive characteristics that have remained unchanged over millions of years.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
Both reptiles and birds lay amniotic eggs, which provide protection and a stable environment for the developing embryo.
Ref: NCERT Class 11 Biology Chapter 4: Animal Kingdom Phylum Mollusca and Echinodermata
