Transcript Evidence For Evolution

By: Toni Albaum
LeeAnn Fontes
Zach Klein
Alex
Evolution
• A change in species
over time
• Changes take many
generations to spread
• Changes are supposed
to improve species
• Darwin had five
theories of evolution.
Microevolution
• Our example is Reddish
Dragonfly
• Microevolution is a
change within species
• Microevolution occurs
in many different forms
• Changes are small, in
gene pools
Reddish Dragonflies
• Example of
Microevolution is
Reddish Dragonflies
• Over generations
their size has
decreased
• Adaption to heat is
the cause
• Temperatures rise,
size will slowly
decrease
Macroevolution
• Macroevolution is
microevolution on a
large-scale
• Takes place over billions
of years
• Not proven, however is a
theory
• Anything’s possible over
time and change
Convergent Evolution
• birds belong to class Aves
• birds survive on wings.
• birds see- bats
echolocation.
• bats survive on
nocturnality.
• Nocturnal -> awake at
night.
• Bats eat different things.
Vestigial Structure
• Human's don't need
the appendix
anymore.
• Appendix-> used to
digest high- cellulose.
• Cellulose is a type of
sugar.
• Cellulose is in plant
cell walls.
Evolution Theory or Conclusion
•
•
•
•
Everything related through branches over time
Only the fit survive, better adapted
Number’s compete for resources, winners live
Change takes hours or millions years
Bibliography