Animal Life and Food Chains
The Food Chain
Far left: Plant (eaten by aphid)--> Aphid
eaten by the spider-->
Spider (eaten by small bird)--> Small
bird (eaten by bird of prey)-->
Mouse (eaten by bird of prey) Bird of prey
(the end of this chain)
Frog Life Cycle
Frogs lay their eggs in water (1) which hatch
out into
tadpoles (2). The tadpoles slowly change
into adults
(3 and 4), then come out of water to breathe
air and live
on land (5)
Frogs belong to the species of amphibians.
Frogs have smooth skins and are usually smaller
and
slimmer than toads. Webbed toes and strong
back legs
make frogs good swimmers. Frogs can breathe
through
their skin, as well as through their lungs.
Amphibians
Amphibians can live both in water and on
land . They are
cold-blooded, which means that their body
temperature is
the same as their surroundings. Many amphibians
begin
life as tiny, fish-like tadpoles, which live
in water and breathe
through gills. As they grow, their bodies
slowly change. By
the time they are adults, they are able to
live on land and
breathe through their lungs. The 4,000 or
so species of
amphibians are divided into three groups
- frogs and toads,
newts and salamanders, and caecilians.
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