Question

what are the differences between mollusca and arthropoda? give at least 4 points. kindly answer this question for me!!!

Answer 1

The body of arthropods is segmentedinto Head ,Thorax and Abdomen (there are a few exceptions) but in Molluscsthe body is Unsegmented but there is a distinct Head,Visceral Hump and Muscular Foot.Arthro - means Jointed…Poda means Appendages.Therefore it is clear that Arthropods have jointed appendages whereas Molluscs do not have jointedappendages.Arthropods have a Chitinousexoskeleton while Molluscs have a calcareous exoskeleton (if present).Most Arthropods undergo Ecdysis/Moulting but molluscs do not undergo ecdysis. Ecdysis is the phenomenon of shedding the chitinous exoskeleton at regular intervals by Arthropods.Arthropods respire using gills, book gills, book lungs and tracheal system. Molluscs respire using Ctenidia.Arthrops have Antennae, Simple and Compound Eyes and Statocysts as Sensory Organs.Molluscs have Sensory Tentacles in the anterior head region instead of antennae and also have Osphradium in addition to the sensory structures of arthropods. Osphradium is a sensory structure which tests the chemical nature of water.Excretory structures in arthropods are Malphigian Tubules and are Uricotelic organisms (mostly). Molluscs have Organ of Bojanus and Kebers Gland as excretory structures and are Ureotelic organisms.

Answer 2

Mollusca

1 They have a soft body

2 they have muscular foot for locomotion

3 they have strong exoskeleton called shell around them.

4 they may be either aquatic or terrestial

Arthropoda

1 they have much stronger body than mollusca

2 they are divided into crustacea, arachnida, insecta, and myrida

3 they have jointed pairs of legs

4 some of them can fly but not all

Ex of mollusca Snail, octopus etc

Ex of Arthropoda butterfly, crab, etc.