Posts Tagged ‘Food Web’

Biology/Ecology Help Please?

Thursday, May 21st, 2009
ZeroGravityyy asked:


i Need these answers and i would like someone to help me.

1) What is the term for an evolutionary change in one species
that results in the evolutionary change of another species?

A. Binary evolution
B. Competitive evolution
C. Coevolution
D. Interactive evolution

2)2. All the interconnected paths of energy flowing from species
to species in an ecosystem is called a

A. detrital food web.
B. trophic level.
C. food chain.
D. food web

3. The number of individuals an environment can sustain for an
indefinite period of time is called its
A. limit of growth.
B. rate of growth.
C. carrying capacity.
D. ideal birth rate.

Thank you!

Barbara

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Posted in Homework Help | 1 Comment »

ECOLOGY/ SCIENCE HELP?

Saturday, April 25th, 2009
coolio asked:


ok i really need some help i completely do no understand any of this science

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:)

Gladys

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Posted in Biology | 2 Comments »