Question

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HEY FRIENDS BACK WITH A CHALLENGE.



GIVE THE MAIN FEATURES OF THESE MAJOR GROPS OF ANIMALS. (AT LEAST 5 )

Answer 1

-----------PORIFERA-----------
Porifera commonly known as sponges.
These are multicellular organisms .
Most of the poriferas are live in marine water .
Body is cylindrical and asymmetrical.

-----------NEMATODA-------------
Nematodes often confused with red worms because both have same body designs.
Simple digestive system.
It has a protective layer of cuticle.

--------------ANNELIDA-----------
Annelids means little rings.
Annelids are bilaterally symmetrical animals .
It has a protective cell wall.
Range in length from 1mm - 3mm.

--------------ANTHROPODA----------------
The body structure of anthropoda is bilaterally symmetrical .
They are triploblastic.
They can be found on land , water and soil as well.
They have jointed limbs.

-----------------MOLLUSCA-----------
Mollusca are mostly found in marine water.
The body is unsegmented and bilateral symmetrical.
complete digestive tract.
Usually separate sexes.

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Answer 2

porifera

1.they are called porus animals ,as they have pores all over the body.

2.they have a single large opening at one end of the body.

3.they are the simplest multicellular organism.

4.they are found in seas and fresh waters.

5.they cannot move and are attached to the bottom of the water bed.

ex-sponges,sycon

cnidaria

1.the body looks like a hollow bag.

2.they have a mouth at one end.

3.they have finger like projection called tentacles.

4.tentacles have stinging cells called cnidoblast

5.they paralysie the prey with the tentacles

ex-hydra,jellyfish

platyhelminthes

1.they have a fLAT BODY.

2.BODY IS UNSEGMENTED.

3.THEY LIVE MOSTLY AS PARASITES.

4.THEY HAVE NO LEGS.

5.MOUTH IS PRESENT AT ONE END OF THE BODY.

EX-TAPEWORM,LIVER FLUKE

NEMATODA

1.THEY HAVE A NARROW AND CYLINDRICAL BODY.

2.BODY IS UNSEGMENTED.

3.THEY MAY BE FREE LIVING OR PARASITIC.

4.THEY HAVE A MOUTH AND TAIL.

5.MALES AND FEMALES ARE SEPARATE.

EX-ROUND WORM,ASCARIS

ANNELIDA

1.THEY ARE CALLED TRUE WORMS.

2.BODY IS SOFT AND SEGMENTED.

3.LATERAL APPENDAGES,IN THE FORM OF SETAE OR PARAPODIA HELP IN LOCOMOTION.

4.THEY RESPIRE THROUGH THE BODY SURFACE OR GILLS.

5.THEIR BLOOD IS RED IN COLOUR DUE TO THE PRESENCE OF HAEMOGLOBIN.

EX-EARTHWORM,LEECH

ARTHROPODA

1.THEY ARE ANIMALS WITH JOINTED LEGS.

2.THEIR BODY IS DIVIDED INTO HEAD,THORAX AND ABDOMEN

3.THEY HAVE ANN OUTER TOUGH COVERING OR EXOSKELETON.

4.THEY HAVE COMPOUND EYES WITH MANY LENSES.

5.THEIR VISION IS CALLED MOSAIC VISION.

EX-BUTTERFLY,COCKROACH

MOLLUSCA

1.THEY HAVE A SOFT ,UNSEGMENTED BODY.

2.THEIR BODY IS ENCLOSED IN A HARD SHELL OR EXOSKEETON MADE OF CALCIUM CARBONATE

3.THEY ARE MAINLY AQUATIC ANIMALS.

4.LOCOMOTION IS BROUGHT ABOUT BY MUSCULAR FOOT.

5. THEIR BLOOD IS BLUE DUE TO THE PRESENCE OF PIGMENT HAEMOCYANIN.

EX-SNAIL,OCTOPUS

ECHINODERMATA

1.THEY ARE MARINE ANIMALS.

2.THEIR BODY IS STAR SHAPE OR BALL LIKE.

3.THEY HAVE NO HEAD OR TAIL.

4.THEIR BODY IS ROUGH AND SPINY.

5.THEY HAVE THE POWER OF REGENERATION.

EX-STARFISH,BRITTLE STAR

CHORDATA

1.THEY HAVE A DORSAL ,HOLLOW NERVE CHORD.

2.THEY HAVE THE CHARACTERISTIC NOTOCHORD.

3.THEY HAVE PHARYNGAEL SLITS.

4.THEY HAVE A POST-ANAL.

5.THEY ARE BILATERALLY SYMMETRICAL.

EX-SEA SQUIRTS

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