Biology summer exam 2013

Invertebrates

• Animals without a backbone or internal skeleton
• 5 main groups of invertebrate

Echinoderms

• Spiny Skin
• 5 parts to he body
• Suckers on tube like feet help them to move
• Live in the sea

Coelenterates

• Sac like body with one opening
• Stinging tentecales
• Live in water

Worms

• 3 main groups
• Flatworms have a flat body
• Round worms have a smooth, thread like body
• Segmented worms have a…