Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
AR Singh from Kanpur, India is saying Aschelminthes (round worms) is correct answer
Nazia Sayed from Mumbai, India is saying Sponges is correct answer
Bakhtawer Akbar from Larkana, Pakistan is saying Coelenterates (Cnidarians) is correct answer
Vandana Ch from Gandhinagar, India is saying Sponges is correct answer
Eishna Sharma from Jammu, India is saying Sponges is correct answer
- [A] Nephridia
- [B] Flame cells
- [C] Coelom
- [D] Gizzard
- [A] Germ layers are tissue layers in the embryos of all animals except sponges.
- [B] Germ layers include ectoderm, endoderm, and mesoderm.
- [C] Flatworms have three germ layers whereas cnidarians and ctenophores have two.
- [D] All of these are correct.