Which of the following organism is radially symmetrical?
Pteridophytes have naked embryos and vascular tissue.
Hydra
Earthworm
Frog
Fish
Hydra is radially symmetrical.
The two organisms which breathe only through their moist skin are :(a) fish and frog(b) frog and earthworm(c) leech and earthworm(d) fish and earthworm