Transcript Evidence for Evolution

Changes in metabolic processes.Direct evidence of
evolution:
Examples –
1. Bacteria acquiring antibiotic resistance
2. Insects & weeds becoming resistant to pesticides
The fossil record shows a few species near
Earth’s beginning only recently branching into
the diversity of today.
• Structural features
with a common
evolutionary origin
• Can be similar in
arrangement, function,
or both.
Body parts of
organisms that do
not have a common
evolutionary origin,
but are similar in
function.
Example – wings on a butterfly, bird, & bat
A body structure that has no function in a present day organism
but was probably useful to an ancestor.
Examples –
1. Appendix in humans
2. Eyes of blind mole-rats & cave fish
3. Wings on flightless birds like ostriches
By looking at embryos,
the earliest stage of
growth & development,
scientists have
determined similarities
that suggest evolution
from a distant, common
ancestor.
By comparing the DNA of
different species, we can
determine how closely they are
related.
Summary
List the evidence for evolution