1. Life on Earth
Thinking about humans, can you think of 3 examples of
genetic and 5 examples of environmental variation?
Genetic Environmental
1. 1.
2. 2.
3. 3.
A species is a group of organisms that…
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Over 98% of human
genes are the same as
those of a chimpanzee,
but only 85% are the
same as a mouse.
Selective breeding involves selecting
organisms with desirable
characteristics and breeding them
together. Next – selecting the offspring
that display these desirable
characteristics and breeding them
Which organisms are commonly used
for breeding?
_______________________
_______________________
_______________________
How does natural selection differ from selective breeding?
Natural selection Selective breeding
Plants and animals of one species are in
competition for resources. What are these
resources?
_____________________
_____________________
Sometimes when DNA is copied a mistake is made. What is the
scientific name given to this?
Hormone system Nervous system
Speed of
response?
Chemical or
electrical?
Carried through
blood or nerve
cells (neurones)?
Human beings have 2 main differences
from apes – what are they?
1. __________________________
2. __________________________
