Question

5 features of phylum - porifera and 5 features of phylum - Arthropoda

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Answer 1

PORIFERA

$\leadsto$ Perifera includes lowest of multicellular animals commonly called sponges.

$\leadsto$ All sponges are aquatic mostly marine, few are freshwater.

$\leadsto$ They are mostly asymmetrical animals.

$\leadsto$ They have a water transport system.

$\leadsto$ They are primitive organisms with cellular level of organization.

$\leadsto$ They reproduce sexually by formation of gametes and asexually by budding or fragmentation.

Example : Spongilla, Euspongia and sycon.

ARTHROPODA

$\leadsto$ They are largest phylum of animal kingdom.

$\leadsto$ They are Triploblastic, bilaterally symmetrical and metamerically segmented.

$\leadsto$ Body is divisible into head, throx and abdomen.

$\leadsto$ Muscles are mostly striated and digestive system is complete.

$\leadsto$ Circulatory system is open type with a dorsal heart, arteries and blood sinuses.

$\leadsto$ Sexual dimorphism is exhibited. Fertilization is usually Internal.

Example : Apis, Aedes, Locusts, Butterfly, scorpions,. etc