Which of the following is not an annelid?

1. Leech

2. Earhtworm

3. Sea mouse

4. Sea cucumber

Buoyancy in a bony fish is maintained with the help of

(1) streamlined body

(2) paired fins

(3) swim bladder

(4) all the above

In which of the following animals the adults have pentamerous radial symmetry while their larvae are bilaterally symmetrical?

(1) Arthropods

(2) Molluscs

(3) Echinoderms

(4) Annelids

Which one of the following features is common in silverfish, scorpion, dragonfly and prawn?

(1) Two pairs of legs and segmented body

(2) Living chitinous cuticle and two pairs of antennae

(3) Jointed appendages and chitinous exoskeleton

(4) Closed blood circular system

Which one of the following is correctly matched with its one characteristic and the taxon?

Which of the following does not come under the Class Mammals?

(1) Flying fox

(2) Hedgehog

(3) Manatee

(4) Lamprey

National bird of India is

(1) Psittacula

(2) Passer domesticus

(3) Pavo cristatus

(4) Parakeet

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.