Northampton Area HsBIO

ECOLOGY

1)Why does the twilight zone of the ocean have the greatest variation in temperature?

2. How does natural selection work?
3. How can mutations benefit a species?
4. Why do populations in the deep sea tend to have longer life spans than those in the higher layers?
5. What is measured when marine scientists measure populations?

6. Why is it useful for scientists to divide the deep zone into three separate zones?

7. Why do you think that only single-celled organisms live in the hadalpelagic zone?
8. Natural selection suggests that creatures with mutations disadvantageous to survival will not live to reproduce, yet there are examples, such as albino animals, found occasionally. Do these exceptions discredit natural selection? Explain your answer.
9. Is it possible for marine scientists to get an exact count of a population? Why or why not?
10. How can marine scientists use information discovered through rarefaction? Give two examples.