Animals having dorso-ventrally flattened body are

Assertion: The members of platyhelminthes are commonly called flatworms. Reason: Platyhelminthes have dorso-ventrally flattened body.

_________have dorso-ventrally flattened body.

The name of phylum is derived from certain features of animals. Select that how many of these are correct. A. Cnidaria-Cnidoblasts/cnidocytes b. Latworms -Dorso-ventrally flattened body c. Platyhelminthes-Circular cross section d. Aschelminthes-Body surface is indistinctly Marked out into segments or metameres e. Echinodermata-Exoskeleton of calcareous ossicles.

In the following questions , a statement of assertion (A) is followed by a statement of reason . (A): Flatworms are dorso-ventrally flattened organisms. (R): They are acoelomate and parenchyma cells originating from mesoderm fill up the cavities of the body.

In the following questions , a statement of assertion (A) is followed by a statement of reason (R). A: Flatworms are dorso-ventrally flattened organisms. R: They are acoelomate and parenchyma cells originating from mesoderm fill up the cavities of the body.

Match the column-I with the column-II and find out the correct answer : {:("Column-I","Colum-II"),("(a) Spongocoel","(i) Arthropoda"),("(b) Dorso-ventrally flattened body"," (ii) Cnidaria "),("(c) Coelenteron cavity"," (iii) Porifera "),("(d) Chitinous exoskeleton"," (vi) Platyhelminthes "):}

During a field trip Raju has some organisms with the following characters. Help him to identify the phyla of those organisms. a) Metameically segmented body. b) Body covered with calcareous shell. c) Dorso-ventrally flattened leaf like body. d) Body divided into head, thorax and abdomen.