in ecosystems, organisms are in deadly competition with...

This preview shows page 1 - 3 out of 8 pages.

MEC 280 MIDTERM 1 1. the definition of “pollute” is to make unclean, impure, or corrupt, as well as regulate . 2. in children, lead interferes with the development of the brain . 3. in ecosystems, organisms are in deadly competition with each other for evolutionary survival.
4.
5.
6.
7. an ecosystem is made up of organisms plus that part of the environment with which the
8. the term organisms in an ecosystem refer to all of the above 9. the phenomenon in which two agents acting together create an effect greater than that predicted by knowing only the separate effect of the individual agent is known as synergism . 10. the phenomenon in which two agents acting together create an effect lesser than that predicted by knowing only the separate effect of the individual agent is known as antagonism . 11. define TFR: number of births per woman ; if TFR < 2.1 the population usually contracts 12. one of the pollutants associated with the Owens Lake problem was arsenic 13. archeological records indicate that the first homo sapiens appeared about 150 thousand years ago . 14. . . .
15. according to recent estimates the human carrying capacity of earth is 7 to 12 million
16. when did human agriculture begin? 10,000 years ago . 17. during the agricultural period, diseases became more common by means of all of the above . 18. when approximately was the homo habilis evolved? 2.5 million years ago . 19. which among all species, is the least similar to modern humans? Homo Habilis . 20. after about 25000 years, the Cro Magnon numbers had increased to around 5 million . 21. today the earth’s human population is about 6 billion . 22. which of these countries has the lowest TFR value? Italy . 23. the average value for the global TFR is about 2.7 . 24. which specie had the most impact on their environment by contribution to the extinction of the large animals? Cro Magnon

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture