Question

rearrange:-
a)that life began/centuries ago/scientists think/twenty million/on earth/about
b)endless process/the plants and animals/of evolution/are the products/we see around/us/of an/which
c)by their environment/all the animals/and are molded/are the products of /their habitat.

Answer 1

a. scientists think that life began about twenty million centuries ago on Earth.
b. the plants and animals which we see around us are the products of an endless process of evolution.
c. all the animals are the products of their habitat and are molded by their environment.

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Answer 2

a) Scientists believe that life began on earth about twenty million centuries ago.

b) The plants and animals which we see around us are the products of an endless process of evolution.

c) All the animals are the products of their habitat and are molded by their environment.