2All animals can be classified as belonging to one of two groups: Those with backbones.Those without backbones.
3Animals without backbones are called INVERTEBRATES. There are many different types of invertebrates such as:spongesanemone, jellyfishwormssnails, clams and octopusesstarfishinsects, spiders, ticks
4ArthropodsInsectsThey have got three main body parts: the head, the thorax and the abdomen.They have got six legs and two antennae.Many insects have got wings like the butterfly, fly, bee, ant......
5Arthropods Arachnids They have got eight legs. They haven't got antennae.They can live in land or fresh water.Some examples of arachnids are spiders, scorpions, mites and ticks.
6Snails and slugs They have got soft bodies. They haven't got legs. They have got two antennae.Snails have also got a shell.
7Worms They have got soft bodies. They haven't got legs, a shell or atennae.They can be flat, round or segmented.Earthworms live under the ground.
8Most invertebrates lay eggs. They're oviparous creatures. The mother lays lots of eggs.The larvae come out of the eggs.The larvae become adults.The larvae grow and change.
9Some insect larvae change a lot when they grow. METAMORPHOSIS1. A butterfly lays eggs.2. The butterfly larvae come out of the eggs.3. The larvae are called caterpillars. They eat lots of leaves.4. The caterpillar makes a special covering. It's called a cocoon.5. When they come out of the cocoon, they're butterflies.