3. Animals can be:
Vertebrates or invertebrates.
Carnivores , hebivores or omnivores.
They can have sexual or asexual reproduction.
Big groups:
Mammals, fish ,birds ,amphibians , reptiles , (vertebrates)
Arthropods: insects , arachnids , miriapods and
crustacians .
Mollucs;
Cnidarians;
Echinoderms; (invertebrates)
5. Mammals facts:
Mammals are warm-blooded animals
All mammals have hair even dolphins and wales that live in the
ocean.
Most mammals are helpless when they are babies .
All mammals babies drink milk from their mothers .
6. Fish facts:
Fish have been on the earth for more than 450 millions
years.
Fish were well stablished long before dinosaurus
romaed the Earth.
There are over 25.000 identified species of fish in the
Earth.
It is estimaded that there may still be over 15.000 fish
spieces that have not yet been identified .
7. Birds facts:
Birds have feathers , wings ,lay eggs and are warm
blooded.
There are around 1000 different species believed that
birds envolved from thereopod dinosaurs .
Birds have hollow boneswhich helps them fly.
8. Reptiles facts:
Reptiles are covered in scales or have a bony
external plate such us a shell. The first reptiles
are belived to have envolved around 320
millions years ago . The size of reptiles brains
relative to their body is much smaller than that
of mammals.
9. Amphibians facts:
Most amphibians have thin, moist skin that helps them to
breathe.
Amphibians are considered vertebrates as they have a
backbone.
Frogs swallow their food whole. ...
Frogs cannot live in salt water.
All amphibians have gills, some only as larvae and others
for their entire lives.
10. Arachnids facts:
Most spiders have eight eyes, but some have
only two, four or six.
All spiders have venom, but only a few kinds of
spiders are dangerous to people. ...
Scorpions have a stinger and strong pincers to
deal with prey.
Most arachnids can only eat liquid food.
12. Arthropods facts:
Arthropods Facts. An arthropod is an invertebrate
with an exoskeleton, which includes a segmented body
with jointed limbs ... It is estimated that there may be
as many as 5 million arthropod species in the world,
and this accounts for as much as 80% of the known
species of animals on the planet.
13. Myriapods facts:
1 The Myriapods are centipedes and
millipedes , and some small relatives. 2
Millipedes usually have round bodies, and
have two pairs of legs on each body segment.
3 Centipedes are usually flattened, and only
have one pair of legs per segment.
