BIOLOGY [1 Mark Question Answer]

Has a flattened ribbon-like body: Tapeworm

Can live in water as well as on land: Frog

Star-shaped body: Star-fish

Fixed animals with a pore-bearing body: sponge

(a) Tapeworm (b) Ascaris

Flatworms: 1. Tapeworm 2. Liver fluke

Arthropods: 1. Crab 2. Centipede

Coelenterates: 1. Hydra 2. Jellyfish

Reptiles: 1. Snake 2. Lizard

Segmented worms: 1. Earthworm 2. Leech

Amphibians: 1. Frog 2. Toad

Fish exchange gases in water through gills. Gills enable the fish to obtain oxygen dissolved in the water.

butterfly: the butterfly is an insect whereas rest three are Cnidarians.

Centipede and Millipede

jellyfish: jellyfish belongs to Cnidarians whereas the rest three are echinoderms.

eel: the eel is a fish whereas the other three animals are reptiles.

Annelids have a special organ of excretion called nephridia.

earthworm: earthworm is an annelid whereas the rest three are molluscs.

Two examples of Platyhelminthes are tapeworms and liver fluke.

The radially symmetrical body is the body that can be divided into two identical halves along any plane, e.g. Starfish, jellyfish.

Adult amphibians tend to stay near water because they have to return to water to reproduce and they always lay their eggs in water, e.g. frog.

frog: frog is an amphibian while the other three are fishes.

Since fish are cold-blooded animals, the temperature of their body also drops when the temperature of water drops.

Invertebrates are animals without a backbone, e.g. Insects, worms.

spider: spider is the odd one out because it is an arachnid whereas rest three are insects.