The way we are and our traits comes from our genes . Genes are on long chemicals called DNA . DNA is four chemicals . It is very long and very thin, about 1 billion times longer than it is wide . DNA is found in the nucleus of the cell . DNA is shaped like a double helix.
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Today we are talking about cells
replicating INSIDE your body.
C always joins with G
Deletion: (one pair of letters in gone)
Addition: (one more pair of letters comes)
Substitution: (one pair is changed for
a different one)
1. Do not work like regular cells.
2. They “steal” nutrients from other cells.
3. The nucleus is larger than other cells.
Chemotherapy (化疗) gives a very
Powerful drug through
an intravenous drip (IV drip)
The drug kills cancer cells
but also kills regular cells.
What is the candy’s environment?
What are the predators (大鳄)?
The candies’ environment is the classroom.
The predators are us.
Which candies are the fittest?
The candies that are not delicious are
the fittest because they
survived the best.
Who can guess the top 5?