Question

How many statements are not incorrect

(i) Radial symmetry is present in larva of
echinodermata.
(ii) Complete digestive system is absent in Porifera
(iii) In Hydra, mouth is present on basal disc.
(iv) True segmentation is present in Cestoda.
(v) Blood vascular system is absent in Nematodes
(vi) In roundworm, anus forms after mouth​

Answer 1

Answer:

3,5,6 are correct

1,2,4 are incorrect..

Explanation:

1-larva of echinodermata : bilateral symmetrical

2-digestive system present in porifera..and digestion is intracellular.

3-yes,in hydra mouth present in basal disc which help for swimming.

4-no,cestoda is under phylum playhelminthes.and pseudocoelomate.

5-correct

6-mouth form first condition is called protostomiate(from-platyhelminthes to mollusc)

and if anus form first ,this condition is called deuterostomiate (from echinodermata to chordata)

THANK YOU...