Question

Which Phylum do the spider and snail belong to out of the options below?
Phylums Poriferans, Cnidarians, Echinoderms, Nemotodes, Platyhelminths, Molluscs, Arthropods

Answer 1

Answer:

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Home»Study Material»Biology for AIPMT»Animal Kingdom»Phylum- Annelida Arthropoda Mollusca and Echinodermata

Home»Study Material»Biology for AIPMT»Animal Kingdom»Phylum- Annelida Arthropoda Mollusca and EchinodermataPhylum- Annelida, Arthropoda, Mollusca and Echinodermata

PHYLUM - ANNELIDA:-

• Lamarck coined the term Annelida.Free living found in moist soil, fresh water, sea or few are parasite.Body is soft elongated, cylindrical or flattened divided into segments or metamers by ring like, groves called Annuli.

Cuticle

• Thin moist albuminoid cutical allow free exchange of gas.

Epidermis

• Single layered epidermis made up of supporting cell, sensory and glandular cell.

Muscle layer

• (a) Circular layer
• (b) Longitudinal layer

Muscle are smooth/unstraited.

Answer 2

Answer:

A snail belongs to mollusca and spider belongs to arthropoda.

MOLLUSCA:-

• The animals which come under this group, have bilateral symmetry.
• They have little segmentation.
• They open circulatory system.
• They have kidney like structures for excretion.
• They have the presence of foot which help them move around.
• Example - Chiton, Octopus, Snails, Unio, Pila, etc.

ARTHROPODA:-

• It is the largest group of animals.
• The animals under this group are biologically similar and segmented.
• They have the presence of open circulatory system.
• They have jointed legs.
• Example - Spiders, Palaemon, Butterfly, etc.