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life past and present (DNA (genetic information (hereditary (.5 mum .5 dad…
life past and present
natural selection
variation
colour
morphology (structure)
tortoise
shell shape
finches
isolation
diets
beak structure
diet
adaptation :
survival
reproduce
population change overtime
theory
darwins theory of evolution
common ancestor
Galapagos islands
comparative DNA
increase match = increase relatedness
fossils records
archeopteryx
bird and reptile traits
transition fossils
comparative embryology
different species are similar e.g. human whale back legs
comparative anatomy
pterodactyl limb
mammals
plate tectonic
evidence
subject to change
how and why
law
"what"
DNA
4 nitrogenous bases A-T C-G
sugar phosphate backbone
sequence
genes
genetic information
nucleus
cell
organism
chromosome
23 pairs
hereditary
.5 mum .5 dad
carried
expressed
double helix
mutations
genetic
extra chromosomes in pair 23
down syndrome
environmental factors
uv radiation
gamma radiation
nuclear
biotechnology
stem cells
disadvantages
limited lifespan
expensive
reject
mutations
advantages
organs grow
repair
saves lives