Which one of the following statements about certain given animals is correct?
1. Roundworms(Aschelminthes) are pseudocoelomates
2. Molluscs are acoelomates
3. Insects are pseudocoelomates
4. Flatworms (Platyhelminthes) are coelomates
Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
1. Coelenterates (cnidarians)
2. Ascheminthes (roundworms)
3. Ctenophores
4. Sponges
1. | absence of true coelom but the presence of metamerism |
2. | presence of neither true coelom nor metamerism |
3. | presence of true coelom but the absence of metamerism |
4. | presence of true coelom and metamerism (metamerisation) |