Finish questions & summary for 6-1 & 6-2 notes

Do now activity What type of Natural Selection is selecting brown rabbits? What type of Natural Selection is selecting for black AND white rabbits? What type of Natural Selection is selecting for ONLY black rabbits?

Section 6-3: speciation Essential Question: How can an environment cause speciation? How can speciation cause a change in relative frequency? Learning Target Justify why an advantageous trait will increase in proportion from one generation to another when provided statistical evidence. Use data to explain how change in gene frequency caused by natural selection is related to environmental factors such as seasonal temperature, climate change, acidity, light, geographic barriers, & evolution of other organisms. Section 6-3: speciation

Don’t forget to chunk your notes!

Fitness: having adaptations to help you survive the environment overview Fitness: having adaptations to help you survive the environment

Fitness: being able to find mates and reproduce to pass on traits overview Fitness: being able to find mates and reproduce to pass on traits

overview Some animals are more fit than others because they are better at finding and attracting mates.

But there are natural reasons why certain species do not interbreed. overview But there are natural reasons why certain species do not interbreed.

Don’t forget to chunk your notes!

speciation Speciation happens when new species evolve, and the new populations become reproductively isolated from each other.

speciation ________ _____ is when members of two populations cannot breed and produce fertile offspring. Reproductive isolation Reproductive isolation

When this happens the populations have different _____ ____. speciation When this happens the populations have different _____ ____. Gene pools gene pools

There are 3 types of reproductive isolation. speciation There are 3 types of reproductive isolation.

Don’t forget to chunk your notes!

_____ _____ is when they do different things. 1. Behavioral isolation _____ _____ is when they do different things. Behavioral Isolation

1. Behavioral isolation This type of isolation is capable of interbreeding but have differences in courtship rituals.

1. Behavioral isolation Examples: Mating Songs Mating Dances Building nests

Don’t forget to chunk your notes!

______ _____ is when organisms are separated from each other. 2. Geographic isolation ______ _____ is when organisms are separated from each other. Geographic Isolation Geographic isolation

2. Geographic isolation For example, populations are separated by: Bodies of water (rivers, lakes, oceans) Mountains Forest or meadow

2. Geographic isolation Why would squirrels, but not birds, be geographically isolated by a river?

These barriers do not always affect birds that can fly over them 2. Geographic isolation These barriers do not always affect birds that can fly over them

Don’t forget to chunk your notes!

3. Temporal isolation _______ ______ is when two or more species reproduce at different times Temporal Isolation Temporal isolation

3. Temporal isolation Example: Early Spring vs. Late Spring

Finish questions & summary for 6-1 & 6-2 & 6-3 notes