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 which of the following sets of organisms, does the external fertilization occur?

1. Echinodermata and mosses

2. Hemichordata and ferns

3. Amphibians and algae

4. Reptiles and gymnosperms

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.

(1) Coconut, cucurbits - dioecious

(2) Honeybee, Rotifers - Parthenogenesis

(3) Ornithorhyncus, Whale - viviparity

(4) Frog, Peacock - external fertilisation

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?

(1) Presence of milk producing glands

(2) Skin is unique in possessing hair

(3) Presence of external ears called pinnae

(4) Homodont type of dentition

Retrogressive metamorphosis occurs in

(1) Hemichordata

(2) Cephalochordata

(3) Urochordata

(4) Vertebrata