The given diagram is of

1.Cnidoblast

2.Cnidocytes

3.Choanocytes

4.Both 1 and 2

Which of the following  not started from Cnidarians?

1.Tissue level of Organisation

2.Radial symmetry

3.Diploblastic body plan

4.Presence of mesoderm

In which of the following form metamerism is present

1.Obelia

2.Hydra

3.Sea anemone

4.None of the above

Which of the following germinal layer is absent in Cnidarians

1.Ectoderm

2.Endoderm

3.Mesoderm

4.Both 2 and 3

Ctenophores are commonly known as

1.Sea walnuts

2.Comb jellies

3.Cnidarians

4.Both 1 and 2

Which of the following attribute is false about Ctenophores

1.Radial symmetry

2.Diploblastic

3.All germ layers are present

4.Tissue level of Organisation

Which of the following is well marked in Ctenophores?

1.Comb plates

2.Tentacles

3.Bioluminiscence

4.Diploblastic body plan

Which of the following is true about digestion of Ctenophores?

1.Extracellular digestion

2.Intracellular digestion

3.Both 1 and 2

4.Neither Intracellular nor Extracellular

Which of the following is true about Ctenophores?

1.Reproduction takes place by sexual means only

2.Fertilisation is external

3.Indirect development

4.All of these

Pleurobrachia is

1.Hermaphrodite

2.Dioecious

3.Bisexual

4.Both 1 and 3