“Sneaky Cricket” Name: ____________________________
A Natural Selection Story Date: ___________________ Hour: ____
Male crickets chirp to attract females. Is that the whole story?...
ANSWER THESE FIRST
1. Natural selection is (circle the correct choice)
- the same as evolution or b. one way evolution happens or c. the only way evolution happens
2. What are the four requirements for natural selection to take place?
3. Evolutionary “fitness” is defined in this class as “the __________________________ an organism will ____________________ and ________________________________”
4. Does fitness always mean biggest? Yes No
5. Does fitness always mean fastest? Yes No
6. Read “Survival of the Sneakiest.” Then answer the following questions. (Can be found at this website)
7. Why is having a loud call good for a cricket?
8. Why is having a loud call bad for a cricket?
9. Who attracted the female cricket?
10. Who got to mate with the female cricket?
11. a. Which male cricket is more fit in this story, according to our definition? ___________________
12. What aspect (or member) of the crickets’ environment was the ultimate “selective force” (the “decider”) that determined who lived and died?
13. If a trait is more fit in one environment at a certain time, does that necessarily guarantee the trait is fit in the same environment at another time? Yes No
14. If a trait is more fit in one environment at a certain time, does that necessarily guarantee the trait is equally fit in a different environment? Yes No
15. Explain a situation in which the relative fitnesses of the two male crickets would be reversed.
BONUS: What made sneaky cricket more fit - his body or his behavior? Explain why you say so.