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SCIPAD - BIG IDEAS - BOOK 2
THE BASIS OF HEREDITY
8. The photos below shows three fossil skulls of early human relatives.
(a) Referring to the diagram on the right, which layer of rock is:
The oldest?
The most recent?
(b) Suggest which fossil that would have been found closest to the
surface.
(c) Name the fossil that would have been found closest to the
bottom of the rock profile.
(d) If a Homo habilis fossil was found in Layer D, in which layers could a Homo erectus
fossil possibly be found?
9. Some plants, such as the strawberry, are able to reproduce both sexually and asexually.
The diagram below shows a strawberry plant.
Compare sexual and asexual reproduction by describing both processes. In your answer
you should include:
•
The number of parents required.
•
The relative time required to produce offspring.
•
Variation between the parent and offspring.
A
B
C
D
E
F
G
H
A. africanus - 3 to 2
million years old.
Homo erectus - 1.8 to
0.3 million years old.
Homo habilis - 2.3 to
1.4 million years old.
Flower
Young clone
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