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Biology, 05.03.2021 19:30 bertrandcherlan

Ajg 1 MzY5OTcxOTM5/details (a) Scientists found fossilised shells of one species of animal in the rock layers of a cliff The
age of each layer (A-E) is shown
Age of layer
in millions
of years
Shell
2
A
slit
5
B
2
c
8
D
E
Use the scale bar to give the diameter of the oldest shell
10
Diameter
mm
Describe two ways that the shell evolved (changed) over time
[2]
Species that fail to evolve may become extinct What is the meaning of the term
extinct
11
Scientists think that this species became extinct about 2 million years ago Give the
evidence in the diagram that supports this idea
111
Species evolve by natural selection
Gve the name of the scientist who first described evolution by natural selection
-
.

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Answers: 3

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