Evolution Unit 5

Evolution Unit 5

Evidence for Evolution

Evidence: Comparative Anatomy

• Embryology

• Vestigial Structures

• Analogous Structures

• Homologous Structures

Guess the Embryo

Write the letters in the Zoom chat of which embryo you think is the human, tortoise and fish.

Vestigial Structures

No longer used because no longer needed.

Multiple Choice

A saber toothed cat and a saber tooth marsupial do not share a common ancestor, therefore the teeth are considered ___________?

• mutations

• analogous structures

• vestigial structures

Fossil Evidence

fossil record = provides evidence of a common ancestor to many species (for example land and water species)

Cladogram

A group of organisms branch off when a new trait evolves

**Organisms evolved from simple to more complex

Multiple Choice

Mr. Morales is teaching a lesson on classification. He says that spiders are classified as a different group than insects because they have eight legs instead of six legs. He explains that spiders evolved first.

Mr. Morales also says that having eight legs is the derived trait that separates the two groups. Antonio thinks Mr. Morales is wrong. Which piece of information is Antonio considering?

• spiders do not have 8 legs

• If spiders evolved first, six legs is the derived trait.

• insects do not have 6 legs

• Spiders do not have derived traits, since they evolved first.

Molecular Evidence

• Miller Urey

• Molecular Clocks - uses DNA to compare how long

Multiple Choice

Why are the Miller-Urey experiments essential to the theory of evolution?

• showed electricity can create humans

• showed that a vital force creates life from smoke

• showed how organic molecules could have been made from Earth's early atmosphere

• showed how atoms are formed and combine to form fish

Molecular Clock

Virus 1 and 4 have been evolving separately for a shorter time than Virus 1 and 10

Hominoids -

• Hominids = walk upright on 2 legs (bipedalism) - separates us

• Non-Human Primates

Hominids vs. Non Human Primates

Australopithicus, Homo habilis (using tools - after this the size of our brains increased), Homo erectus, Homo sapiens, Homo neaderthalensis

Authenticity of work on Evolution

• credentials

• claim and evidence

• current

• peer reviewed