Metamerism is an important character of annelida and arthropoda. The body is divided externally into segments called metameres. Metamerism is also exhibited by chordata due to repetition of a succession of homologous structures along anterio-posterior axis.

Correct Option: B

Metamerism is an important character of annelida and arthropoda. The body is divided externally into segments called metameres. Metamerism is also exhibited by chordata due to repetition of a succession of homologous structures along anterio-posterior axis.

Silver fish (Insecta), scorpion (Arachnida); crab (Crustacea) and honey bee (Insecta) all belong to phylum Arthropoda which is characterized by the presence of jointed appendages. Poison gland occur only in scorpion. Compound eyes and metamorphosis are the characteristic of insects.

Correct Option: C

Silver fish (Insecta), scorpion (Arachnida); crab (Crustacea) and honey bee (Insecta) all belong to phylum Arthropoda which is characterized by the presence of jointed appendages. Poison gland occur only in scorpion. Compound eyes and metamorphosis are the characteristic of insects.

Sponges show cell aggregate body organization. Cell tissue organization appear in coelenterates. Platyhelminthes show tissue organ organizations.

Correct Option: B

Sponges show cell aggregate body organization. Cell tissue organization appear in coelenterates. Platyhelminthes show tissue organ organizations.

Haemocyanin is the pigment carrying O₂ in molluscs. Annelids have erythrocruosin.

Correct Option: A

Haemocyanin is the pigment carrying O₂ in molluscs. Annelids have erythrocruosin.

Post anal tail is present in chordates at some stage in the life.

Correct Option: D

Post anal tail is present in chordates at some stage in the life.