Question

Give any one difference between each of the following:
(a) Protozoa and Metazoa
(b) Vertebrate and Invertebrate
(c) Insecta and Arachnida
(d) Flatworm and Roundworm

Answer 1

(a) Protozoa are unicellular microscopic organisms whereas metazoa is multicellular organisms and can be seen through naked eyes.

(b) A vertebrate is an animal with a backbone and invertebrates are those animals with do not have the backbone or notochord.

(c) In Insecta, the body segment is divided into three parts: head, thorax and abdomen whereas in Arachnida the body segment is divided into two parts: cephalothorax and abdomen.

(d) Flatworm consists of the dorso-ventrally flattened body whereas roundworm consists of a cylindrical body.