Archive for January, 2009

very urgent! need help with population ecology, just help with even 1 question?

Sunday, January 25th, 2009
115 answers asked:


true or false
I. Density-independent growth is also known as exponential growth. ( T / F )
II. Density-independent growth can continue indefinitely in nature. ( T / F )
III. The per-capita rate of increase may change over time during density-independent
growth. ( T / F )
IV. A population that is experiencing density-independent growth levels off at the
environment’s carrying capacity. ( T / F )
2 minutes ago

Rank the following three marine zones in terms of their overall productivity
(1 = highest 2 = intermediate 3 = lowest)
Neritic _______ Oceanic _______ Intertidal _______
Explain briefly the rationale for your ranking.
2 minutes ago

Explain, with examples, the role that species interactions play during ecological
succession.
1 minute ago

1. Which processes increase a population’s size?
a. Births and deaths
b. Births and immigration
c. Deaths and immigration
d. Deaths and emigration

True or false? Factors that determine the intrinsic rate of increase of a population
include the age of breeding and the number of offspring produced each year.

Brenda

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Posted in Botany | 1 Comment »

Don’t you think this war is making our country look like an a-s-s, like George W. Bush’s face?

Thursday, January 22nd, 2009
yes I do asked:


We talk so much about the environment and ecology (global warming and such), but our president elect is fighting a war for oil. The very thing that’s making holes in our atmosphere, expanding out deserts and rising our sea levels, drowning islands and low level lands.
We talk so much about the environment and ecology (global warming and such), but our president elect is fighting a war for oil. The very thing that’s making holes in our atmosphere, expanding out deserts and rising our sea levels, drowning islands and low level lands. The US of A is one of only two countries that has not signed with the rest of the world on environment issues, the other is Australia but that’s because they do everything we do. (Sorry aussie friends)

Herbert

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Posted in Politics | 15 Comments »

Ecology Class - Some Questions ?

Sunday, January 11th, 2009
curious cat asked:


In a natural community, all the living things that directly or indirectly affect the environment are known as…

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

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Posted in Earth Sciences & Geology | 2 Comments »

I need help in ecology?

Wednesday, January 7th, 2009
SPURS CHAMPIONS 2007-08 Season asked:


A 1991 report by Environment Canada showed some contamination by DDT and other pesticides in shellfish, crustaceans, and fish on the Atlantic coast. Chemical pesticides have also been found in shore birds and marine mammals, particularly along the Bay of Fundy and the coast of Newfoundland. The report indicated that although the levels of pesticides are declining in most marine animals, there was still cause for concern. The porpoises in the lower Bay of Fundy still had unacceptably high levels of DDT, at 500 ppm.

(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

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Posted in Earth Sciences & Geology | 2 Comments »

what do you want to, or are, majoring in?

Monday, January 5th, 2009
twilight wolf asked:


I really have issues choosing my major. I really like ecology and stuff like that, but I really can’t make a great living out of it. I’m also leaning on lawyering, but I don’t like laws as much as the environment. What do you suggest? And what do you want to major in, or what are you majoring in?

Paul

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Posted in Other - Careers & Employment | 3 Comments »