ok so these are the q’s:
1. how does DDT enter a food web
2. which organisms contain the most DDT
3. at what trophic level are these species?
4. What is the relationship between the trophic level on an organism and the concentration of DDT in its body?
5. How many times greater is the concentration of DDT in the fish than in the seawater? How many times greater is it in the dolphins than in the seawater?
6. Explain why animals at the top of the food chain are particularly at risk from poisons in the environment?
Please help me answer these q’s answering any would help me a ton:)
any sites would be great too:)
Mike
A.pioneer organisms
B.secondary consumers
C.climatic limitations
D.biotic factors
Which of these is an example of an ecosystem?
A.a population of monarch butterflies
B.all the mammals that live in the Atlantic Ocean
C.all the abiotic factors found in a field
D.the interdependent biotic and abiotic components of a pond
The most likely result of a group of squirrels relying on limited resources would be…
A.competition between the squirrels
B.an increase in the number of squirrels
C.increased habitats for the squirrels
D.a greater diversity of food for the squirrels
Any help is greatly appreciated!!
Connie
(a) Explain how DDT could enter a marine ecosystem.
(b) DDT has been banned in Canada for decades. Explain why animals still carry this toxin in their bodies.
(c) Speculate about why the levels of DDT fall more slowly in porpoises than in other animals in the ecosystem.
Lester
b. Biology
c. Zoology
Sorry, i dont have a book to look these up at the moment
Corey
