Explain the general characters of phylum Arthropoda. Give one example of following classes.
1) Crustancea.
2) Myriapoda.
3) Insecta.
4) Arachnida.
Answers
Arthropoda is the largest phylum of animalia Kingdom..
It is generally known as insects
They have open circulatory system.
For example cockroach,
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General Characteristics Of Phylum Arthropoda...
(Arthros; Jointed, podos; Foot)
1.Kingdom: Animalia
2.Habitat: mostly terrestrial, also aquatic
3.Insects are the most successful life form on the planet: they make up more than half of all living things on Earth
4.Body has Three-part: head, thorax, abdomen.
5.Body is metamerically segmented
Three pairs of jointed legs (6 legs).
6.Compound eyes which contain several thousand lenses leading to a larger field of vision.
7.They possess two antenna.
8.Symmetry: bilateral
9.Germ layer: triploblastic
10.Grade of organization: organ system grade
11.Coelom: hoemocoel
Examples of following clases..
1. Crustancea :- Examples: Cancer (crab), Palaemon (Prawn), Daphnia (water flea) etc.
2.Myriapoda :- Examples: Julus (Millipede), Scolopendra (Centipede), Spirobolus etc.
3.Insects :- Examples; Pieris (Butterfly), Periplaneta (Cockroach), Tabernus (Housefly), Mosquiotes, Ants, etc.
4. Arachnida :- Examples: Aramea (Spider), Palamnaeus (Scorpion), Limulus (King Crab), etc.