Question

Match the features listed under column I with their animal groups under column II and choose the correct option.

$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{1. Cnidoblasts}& \text{p. Sponges}\\ \text{2. Collar cells}& \text{q. Flatworms}\\ \text{3. Pseudocoelom}& \text{r. Coelenterates}\\ & \text{s. Roundworms}\end{array}$

• A. 1-q, 2-r, 3-s
• B. 1-s, 2-p, 3-q
• C. 1-p, 2-r, 3-s
• D. 1-r, 2-p, 3-s

Answer 1

The correct option is D 1-r, 2-p, 3-s

Cnidoblasts are present in phylum Coelenterata and it helps them in injecting toxins in the body of the prey. Collar cells are seen in the body wall of sponges. Pseudocoelom or false coelom is the characteristic feature of phylum Aschelminthes which includes roundworms.