Unit 7 Honors Biology

What is Evolution?

theory that species change over time

What is Scientific Theory?

Testable explanation of phenomena that has occured in the natural world

What is Naturalism?

Mechanism that explains how evolution

What are the 5 evidences for evolution?

1. Fossil Record

2. Biogeography

3. Study of anatomy

4. Similarities in early development

5. Genetics and DNA

What do the fossil record layers show?

Change over time

What do fossils provide?

Evidence of evolution

What are fossils that are in older layers compared to those in upper layers?

More Primitive

What does the geographic distribution of living things show?

Similar environments have similar types of organisms

What does the study of biogeography say about island species compared to mainland species.

Island speciesi most closely resemble nearest mainland species.

What does the study of biogeography say about the population of species?

They can show variation from one island to another

What are homologous structures?

Structures that have different forms in organisms but come from the same embryonic tissue.

Simple definition of homologous structures

Similar anatomical structure, serve different functions

What are analogous structures?

Structures with the similar function but do not have the same anatomical structure

What are vestigial organs

Organs that have no useful function but may hint at an extinct function

What does embryology provide?

Evidence for evolution

What does embryology show in larvae?

Identical larvae but different adult body forms

What does embryology show for organisms?

Similar embryos, diverse organisms

Why are genetics and DNA useful for the evidence of evolution?

All living things use information coded in DNA to carry information from one generation to the next

Why are homologous genes used for evidence?

Like Hox genes, they can be found in all animals which shoes that genes are being inherited form ancient common ancestors