Chapter 3.4 (pages 84-87). Key concepts: Identify three kinds of adaptations that help organisms survive. Describe the four parts of natural selection.

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Presentation transcript:

Chapter 3.4 (pages 84-87)

Key concepts: Identify three kinds of adaptations that help organisms survive. Describe the four parts of natural selection. Explain how variation occurs within a population Explain why genetic variation within a population is important. Explain how resistance to compounds is a survival characteristic.

Key Vocabulary: Adaptation Natural selection Resistance Camouflage

Quick Write: What do you already know about adaptations?

Adaptations: Adaptation is a characteristic that improves an individual's ability to survive and reproduce in a particular environment. What have we discussed so far about adaptation and reproduction? What are some adaptations for a fish? A dog? When have you learned about adaptations? Sexual reproduction advantages vs. asexual reproduction Adaptations help organisms survive!

Adaptations for obtaining food: What are some adaptations that humans have for eating food? Our hands and teeth are adaptations for our food. The way we bend our fingers. Think about bird beaks…how are they different for the food they eat?

What type of food? How did you know?

Predator/Prey: Defense against predators: – Porcupine? – Skunk? – Bright markings! Beware! Camouflage: disguise the organisms features – Used by prey and predators! – Can be effected by humans What are some examples of camouflage? Let’s talk symbiosis! Why are zebras black and white??? Let’s see

Natural Selection: Natural selection is the process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do. The change in the inherited characteristics of a population over time that BENEFITS the organism…

What ever works the best…

Movie Break:

What adaptations needed? What about a desert?

Review: Adaptations are characteristics that can help an organism survive. The four parts of natural selection are overproduction, genetic variation, competition for resources, and successful reproduction. Variation is due to the exchange of genetic information as it is passed from parent to offspring

Homework: Finish the workbook pages: – Pages: Finish the workbook pages: – Pages: 54-57