One of the world's most poisonous fish toxins is released by

(1) clown fish

(2) sword fish

(3) eel fish

(4) puffer fish

Stinging capsules (nematocysts) are found in

(1) wasp and honeybee

(2) scorpion and cobra

(3) sea pen and sea fan

(4) cactus and Venus flytrap

In the given table, some organisms are classified into categories. However, there is one exception. Select the option with correctly mentioned exceptional organism.

Choose the correct pair.

Select the incorrect statement.

(1) Periplaneta has compound eyes.

(2) Earthworm shows segmentation.

(3) Ascaris shows sexual dimorphism

(4) Liver fluke has a complete alimentary canal

Which of the following waste products in grasshopper is not excreted and is used in other metabolic activities?

(1) Carbon dioxide

(2) Water

(3) Uric acid

(4) Faeces

Select the animal that exhibits retrogressive metamorphosis.

(1) Bufo

(2) Amphioxus

(3) Limulus

(4) Herdmania

Which one of the following is not a mammalian character?

Retrogressive metamorphosis occurs in

1. Hemichordata

2. Cephalochordata

3. Urochordata

4. Vertebrata

Some salient features and phyla of organisms are given below. Select the option which shows the correct combination of organism, its phylum and salient features.