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Life Past and Present - Coggle Diagram
Life Past and Present
Theory of evolution by natural selection
Charles Darwin
VASRP
A
daptation
S
urvival
V
ariation
R
eproduction
P
opulation change over time
Case studies
Galapagos Finches
Shape/Size of beak changes
Galapagos Turtles
Neck length
Peppered Moth
Industrial revolution = increased soot
Dark coloured moth increased in frequency
Theory vs Law
Law - what is happening
Theory - why it happens
Evidence
for evolution
Comparative anatomy
DNA comparison
Embryology
Tectonic plates
Fossil records
Heredity
Reproductive system
to produce sex cells
Male - sperm - 23 chromosones
female - ova (egg) - 23 chromosones
Meiosis
Haploids
2 cell divisions
produce 4 daughter cells
Fertilisation
fusion of sex cells/gamets
DNA
Gene
Segment of DNA
Code for protein
Amino acids are building blocks
Genotype
Genetic combination
Phenotype
Physical appearance
Mutations
Change in the sequence of DNA
Outcome
Positive
Negative
neutral
Mutagens
UV radiation
Melanoma
Chemical
Asbestos
X-Rays
Tobacco
Structure
Double helix
sugar - phosphate
nitrogenous bases
a - t
c - g
