EVIDENCES OF EVOLUTION

​Welcome, STEMazing
to our General Biology 2 session! 🧐

​Jennifer C. Baria
Subject Teacher

​Evidences of Evolution

​Evolution changes in heritable traits of a population over time.

Session's to do list :

• ​ Explain the Evidence of Evolution (e.g. Fossil record, DNA/Protein sequences, Homology, and Embryology) STEM_BIO11/12-IIIc-g-12
  
  - Enumerate the evidences of evolution
  - Determine the evidences of evolution
  

Life is thought to have started as something small and simple - a common ancestor to all species that exist today.

Draw

What evidence do we have to support common ancestry and biological evolution?

​Describe the structure and function of major and subcellular organelles. STEM_BIO11/12-Ia-c-2

​COMPARATIVE EMBRYOLOGY

Open Ended

Do you have any idea what species are they? Or does it belong to one type of a species?

They look almost the same, so you might think they are similar species.

Open Ended

What are the similarities of the following embryo?

​tail

Now let us look at some fully developed species, and think about structural evidence!

STRUCTURAL & ANATOMICAL EVIDENCE

Open Ended

Who are bears closely-related to?..... Is it a cat or dogs? or None? Or other animals?

Well I had to guess, I would think bears are more similar to........

STRUCTURAL & ANATOMICAL EVIDENCE

Structural evidence, also called anatomical evidence, involves comparing the body structures of organisms.

This could involve comparing their teeth, bones, organ etc.

STRUCTURAL & ANATOMICAL EVIDENCE

While structural evidence supports common ancestry, it can sometimes be misleading.

Open Ended

The common living ancestor of bear is actually a sea, how do you think scientist determine that?

MOLECULAR EVIDENCE FROM DNA SEQUENCE

The definition of being related to someone is sharing DNA- your hereditary material.

The definition of being related to someone is sharing DNA- your hereditary material.

From plants to animals, to singled cell organisms there are genes that we have in common

Open Ended

What could us human probably in common with bacteria?

FOSSIL RECORDS

The fossil record is our greatest source of evidence for evolution, because it tells us that species from the past were very different than they are today.

Multiple Select

What are fossil records?

• Collection of fossils

• preserved remains

• traces of ancient animals and plants

• evidence of evolution

FOSSIL RECORDS

Fossils cannot provide DNA, so scientiest analyze the structural evidence to look for similarities and use chemical evidence to determine the age of the fossils.

​Trace the biological and cultural evolution of early to modern humans. UCSP11/12HBSIe-12

1. ​   What evidences did scientist use to support the theory of evolution?

2.   What does scientist infer from the similarities between two structures of organism?

3. How DNA evidence might be used to confirm scientists’ conclusion about any relationship between two organisms?

4. How fossil records give information about the changes in the organism?

5. How can you explain the statement “survival of the fittest”?

LET SUMMED UP!