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TOPIC 2: Cells and Controls
2. GROWTH: PLANTS and ANIMALS
Uncontrolled cell division
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Cards (6)
What is a
mutation
?
A
random
change in a
gene
What is controlled by the chemical instructions in an organism's DNA?
The
rate
at which cells divide by
mitosis
What happens if there is a change in one of the genes that controls cell division?
The cell may start dividing
uncontrollably
, and can result in a mass of
abnormal
cells called a
tumour
.
What is cancer?
If the
tumour
invades and
destroys
surrounding tissue.
How do you calculate growth in plants?
The
height
,
leaf surface area
,
mass
and
percentage change
What is the equation to calculate percentage change?
Final value - starting value / starting value x 100
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