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
-
.
Answers: 3
Biology, 21.06.2019 22:30
Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials
Answers: 2
Biology, 22.06.2019 14:20
As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.
Answers: 1
Biology, 22.06.2019 15:10
Abacteriophage typically attaches to the bacterium and then
Answers: 1
Ajg 1 MzY5OTcxOTM5/details
(a) Scientists found fossilised shells of one species of animal in the r...
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