Download evolution

Gradual change
-> evolution
Gradual change
-> evolution
Gradual change
Complex
forms
Simple
forms
Ancestors
of horse
They showed variations e.g. length of their legs
They lived in plain ( grassland ). Which of them had
greater chance to survive ? Why ?
Natural
selection 天擇
The ones with longer legs survived and interbreed, gave the
genes for long legs to offspring
Natural selection repeated, the length of
legs of horses became longer
Evolve into horses exist today
Individuals with
Variations 變異
Competition
競爭
Nature selection
天擇
the fittest survive
適者生存
Natural selection repeats
重複 “物競天擇 適者生存”
The organisms change in the form
( evolve )and become more and
more adaptable to the environment
the fittest transmit
advantageous
genes to offspring
有利基因傳給後代
Natural
selection
Applied antibiotic
/ antibiotic abuse
MP3
walkman
What causes this gradual change ?
Selection
選擇 by the customers, thus the products
__________
become more and more _____________to
the market.
Adaptable
更適應