Variation vs. Diversity:

Remember that variation is differences within a species (for example, some baby turtles are born slightly slower, and some are born slightly faster).

Diversity is difference between species (for example, there are many species of birds in the rainforest!)

Evolutionary Theory:

Darwin and Lamarck both had different ideas about how species change over time. This video can help you review their ideas. Although they were both great scientists, Darwin's theory is backed by 150 years of scientific evidence!

To practice, choose a trait in an animal, such as a tiger's sharp teeth, and describe how each scientist would have explained the evolution of this trait.

Factors for Evolution:

Make sure you have memorized all four factors of evolution, and you can explain what they are! The factors are COMPETITION, OVERPRODUCTION, VARIATION, and INHERITANCE. Without these things happening, a species will not evolve over time. This video will help you review this, especially if you click to 3:54.

Sexual Selection:

This video gives a basic overview of how sexual selection works. Remember that in nature, we see many examples of female choice and male competition, so you can practice by writing down some examples of each of those patterns.

Natural Selection / Adaptation:

Make sure that you can explain how species change over time in response to the environment! The Peppered Moths is a great example of this, which you can review in this video. This basic video will help you remember the difference between behavioral and physical adaptations.

Need more help??

Send me an email at hsayre@fwps.org, or send me a message through TextRemind. I'm happy to help you with whatever you're stuck on!