animals

Characteristics. It has a shape that moves easily in wáter.Fins help to change directions as it swims.Most fish are coverd wiht protectives scales.

Types. Bony fish and cartilaginous fish.

Characterist.Ampibians bodies change as they grow and they devolop lungs . Almost all are oviparous. Adult are land animals ,but spend time in the wáter.

Types.Anura.Strong back lengs that are longer tan the front legs,to jump and to swinm.Urodela have four legs equals and a long tail.

Characteristics.Most have a tail and four legs .And a thick skin.Snakes have a muscular body that moves from side to side.Snakes and lizards have scales.Some reptiles have shells.Most reptiles are land animals.Are oviparous.Many reptiles spend a lot of time underwater.

Types.Squamata.Reptiles with scales and long tongues.Testudines.Reptiles with shells.Crocodilia.reptiles with strong jaws and teeth.

Characteristics.The body is adapted to make it light.Two of its limbs are wings.Their bones are hollow.Their body is covered with feathers.They have smalls heads and beaks.They have very good eyesight.Birds are oviparous.

Types.Most are flying birds.They have a large sternum, or chest bone.Some speies,like ostriches and penguins,are fligtless birds.

Characteristics.Mammals with four limbs and a tail walk,run or climb.they are usually coverd in hair or fur.bats have wings and are the only that fly.All breathe with their lungs.Most are viviparous.All female mammals produce milk to feed their young.They have different types of teeht depending on their diet.Carnivores.Herbivores.Omnivores.

Types.Placental mammals.Marsupial mammals.Monotremes lay eggs.

Vertebrates have a backbone, an internal bone skeleton.
their bodies have a head, a trunk and limbs.

Porifera are aquatic sponges.

Cnidaria are aquatic organisms like jellyfish,anemones and coral.

Annelids can be aquatic organisms or land organisms.

Echinoderms are aquatic organisms without a head,urchins and starfish.

Molluscs

Gastropods can be aquatic or land animals.They have a flat foot for movig.Some,likesnails, have a shell.

Bivalves are aquatic animals.They have a shell made up of two parts. and a sigle foot shaped like an axe,to dig into the sand.

Cephalopods are aquatics animals.They have a ring of tentacles surrounding the mouth.Some have an internal shell.

Artropods

Arachnids have eight legs.Examples.spiders and scorpions.They have sense receptores called palps.

Crustaceans have ten legs.Most species are aquatics.Examples are crabs and lobsters.

Myriapods have a long body and many pairs of legs.Examples are millipides and centipedes.

Insects have six legs.Many also wings.Examples are ants, bees and butterflies.

Invertebrates do not have a backbone or an internal bone skeleton. Some have a hard shell,or exoskeketon,to protect their body organs.Most invertebrates are oviparous,they lay eggs.