In which one of the following the genus name, its two charcters and its phylum are not correctly matched, whereas the remaining three are correct
Genus name |
Two Characters |
Phylum |
---|
Pila |
(a) |
Body Semented |
Mollusca |
(b) |
Mouth with Radual |
Asterias |
(a) |
Spiny skinned |
Echinoermata |
(b) |
Water vascular system |
Sycon |
(a) |
Pore bearing |
Porifera |
(b) |
Canal system |
Periplaneta |
(a) |
Jointed appendages |
Arthropoda |
(b) |
Chitinous exoskeleton |
Body structure of Mollusca -
Body is covered by calcareous shell and is unsegmented with a distinct head, muscular foot and visceral hump. Mouth contains rasping organ called radula.
- wherein
A soft and spongy skin layer called mantle forms the skin. Mouth cavity is present between hump and mantle which contains feather like gills.
Molluscs are bilaterally symmetrical, triploblastic, coelomate, soft-bodied animals. Thier soft body is covered by a calcareous
shell and is
Option 1)
Pila |
(a) |
Body Semented |
Mollusca |
(b) |
Mouth with Radual |
This is correct option
Option 2)
Asterias |
(a) |
Spiny skinned |
Echinoermata |
(b) |
Water vascular system |
This is incorrect option
Option 3)
Sycon |
(a) |
Pore bearing |
Porifera |
(b) |
Canal system |
This is incorrect option
Option 4)
Periplaneta |
(a) |
Jointed appendages |
Arthropoda |
(b) |
Chitinous exoskeleton |
This is incorrect option