Warm up # 21

1. Warm up # 21 • What do you know about the following terms: • Evolution • Community • Extinction • Genes 2) Describe what you see in video on “Maple Copters”

2. Things in nature look the way they do for a reason. Organisms that have an advantage will survive. Other organisms will go extinct. In nature there are 2 keys to survival: gaining energy and reproducing.

3. Warm Up # 22 • What makes you unique? • What does the word “evolution” mean? • Why do you think species would change over time?

4. Warm Up 22 • You and a friend are chased by a grizzly bear. List some possible ways you can survive. (not harming the bear) • A school of fish are chased by a shark, which fish gets eaten?

5. 3) Which of the fish are most likely to reach adulthood and reproduce? 4) What does the word “evolution” mean?

6. Warm Up 23 1) Explain how this diagram illustrates evolution?

7. 2) A reintroduced population of wolves in a national park is 90% grey and 10% black, consistent with the wolf population in other regions. After several generations in isolation, the national park’s wolf population is 60% grey and 40% black. The wolf population has likely experiencedA. natural selection.B. genetic drift.C. mutations.D. migration.

8. 3) How is the fish on the bottom an example of evolution by mutation?

9. Warm Up 24 1) Explain what an adaptation is and how “NATURE SELECTS?”

10. 2) One of the conditions for natural selection is “Individuals vary in fitness, or reproductive success” Explain what that means.

11. 3) Explain what resistance is, and why it is a problem?

12. Warm Up 25 1) What does this diagram show us?

14. Warm Up 26 • Which “beak” was best for: • Pennies • Sand • Water 2) How is this lab a demonstration of survival of the fittest (natural selection)? 3) What happens to a species if it is unable to adapt to changes in its environment?

15. Warm Up 27 What do you know about the following terms: • Predator • Prey • Parasite • Herbivore • Mutualism

16. Warm Up 28 1) Copy the chart below. For the species indicate either positive (+), negative (-) interaction, or no impact (o).

17. 2) Explain how mutualism and commensalism are different from each other. 3) How are parasitism, herbivory and predation similar?

18. Warm Up 29 1) Define the following terms and give example • Producer • Consumer • Herbivore • Carnivore • Omnivore • Decomposer

19. 2) Use an example to explain how you are solar powered. 3) Explain why photosynthesis is so important to life on Earth.

20. Warm Up 30 • Explain what cellular respiration is

21. 2) In the food web below, give an example of: • Producer b) Primary Consumer c) Secondary Consumer 3) If there were 100 units of energy in the grass, by eating the grass how many unit of energy would the mouse have?

22. 4) In an ecosystem why are there so few owls compared to grass? 5) How do herbivores have an advantage on carnivores?

23. 6) Describe what some possible effects are if there is a disease killing off mice. 7) Which population would you expect to be: a) smallest, b) largest?

25. Warm Up 31 1) Explain the diagram below.

26. 2) What is a pioneer species? 3) What is the difference between primary and secondary succession?