Archive for April, 2009

Can anyone help me with my Biology?

Thursday, April 30th, 2009
jl777 asked:


I was reading my ecology book and there was one part that i didnt understand. English is not my first language so its really hard for me to understand. Can anyone explain to me more easier?

“The recognition that the form and function of plants within a region reflected the constraints imposed by the physical environment led the way for a new generation of scientists that explored the relationship between plant biology and plant geography.”

Thanks!

Barry

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

Ecology Question. What does this mean?

Wednesday, April 22nd, 2009
Kai asked:


I cannot understand this passage in my school book. Could someone more knowledgeable perhaps put this into laymans terms for me or simply describe what you consider this to mean?. I would be so grateful! Thank You. The passage I am caught up on reads:

“The scientific image of hunting and gathering, as a naturally prescribed course of fitness-maximisation, is as illusory as the image that science has of its own enterprise, as a monument to the freedom and pre-eminence of human reason. Far from confronting one another across the boundary of nature, both the people who call themselves scientists and the people whom scientists call hunter-gatherers are fellow passengers in this world of ours, who carry on the business of life and, in so doing, develop their capacities and aspirations, within a continuing history of involvement with both human and non-human components of their environments. If we are to develop a thoroughgoing ecological understanding of how real people relate to these environments, and of the sensitivity and skill with which they do so, it is imperative to take this condition of involvement as our point of departure. “

Delores

Ecology help.please?

Sunday, April 5th, 2009
The Con asked:


I don’t want you guys to think I want you do to my hw so I actually tried to answer the questions.

1) Describe the major abiotic factors that produce Earth’s main climate zone?
-I honestly have no idea.

2) What is the difference between and organisms habitat and its niche?
-A habitat is where an organism lives while a niche is how it interacts with its environment.

3) What type of succession occurs after lava from a volcanic eruption covers an area?
-Secondary.

4) Why are plants generally few and far between in a desert?
-No idea.

5) What are plankton? Name two types of plankton.
-Plankton are organisms that can’t swim against the tide (?)
Two types: Zooplankton, Phytoplankton

Greg

Help with ecology homework?

Sunday, April 5th, 2009
The Con asked:


I don’t want you guys to think I want you do to my hw so I actually tried to answer the questions.

1) Describe the major abiotic factors that produce Earth’s main climate zone?
-I honestly have no idea.

2) What is the difference between and organisms habitat and its niche?
-A habitat is where an organism lives while a niche is how it interacts with its environment.

3) What type of succession occurs after lava from a volcanic eruption covers an area?
-Secondary.

4) Why are plants generally few and far between in a desert?
-No idea.

5) What are plankton? Name two types of plankton.
-Plankton are organisms that can’t swim against the tide (?)
Two types: Zooplankton, Phytoplankton

Sharon