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2. An organism’s niche is the sum of all its interactions in its environment, including interactions with other organisms.
A) True
B) False

1- what is the competitive exclusion principle ?
2- Explain how tow similar species of birds could nest in the same tree and yet occupy different niches.
3- Distinguish between a fundamental niche and a realized niche .
4- State why , in the study of competition between two species of barnacles . Semibalanus balanoides was the superior competitor, yet chthamalus stellatus was not excluded from the community.
5- Distinguish between niche and habitat.
6- can an organism’s realized niche be larger than its fundamental niche ? justify your answer .
7- what are the different niches of Chthamalus stellatus and semibalnus balanoides ?
8- what happened in connell’s experiment with cthmalus stellatus and semibalanus balannoides ?

Our brains are wired to be curious, ingenuitive, and much more. I have a theory that humans are “designed” by evolution to be the “transporters” of life (much like how seeds evolve to spread) – to spread the seed of life into space in case of some catastrophic event beyond the Earth’s power to avoid. At the same time I believe we have been distracted by toilsome endeavorers (the stuff our economies are made of) I know this might sound nutty to some but Carl Sagan had similar thoughts. I know evolution doesn’t think, but look at a sprout, see how it follows the sun? Well, now just imagine that if the entire organism that is Earth (the thing that gave birth to all life on it) has similar tendencies as a single plant or animal, a “force” guiding it towards survival. Sure we may be screwing up, but there’s no guarantee a species will fill its niche (purpose). I brought this up to a Christian friend and he told me that if he’s wrong about the existence of his God that maybe that’s why we long for places like Heaven, and why we feel we’re “stewards”. Your thoughts?

I see stupid things like “If evolution is real, then why are there still monkey? Shouldn’t they have evolved into humans by now?” Really? For those of you who don’t know, back in the day, before Darwin, people believed in “The Chain of Creation” (or something along that line) it had humans at the top and all the lower animals below, so it was basically saying that humans were the pinnacle of creation. Well that’s not how evolution works. About 5 million of years ago humans and chimpanzees diverged (think, a fork in the road). We became what we are today because for us brain power was important, chimpanzees went where they are because that worked for them. Its what’s called a “Niche” its where an organism does best (like a carpenter or a painter, they do best in those jobs, so they stay there).
Also evolution does not say that an organism has to constantly change “if it ain’t broke, don’t fix it” an organism only changes if its niche changes or is destroyed, then-hopefully for the organism-a mutation will acer that will allow it to survive, if not then it will become extinct.
Now if you want to know all the details read “On the origin of species by way of natural selection” by Charles Darwin, or another book on the mechanics of evolution.

Design an organisms that occupies either a low energy or high energy niche.
Your answer should describe how the organism copes with the following environmental stresses:
Calories
Oxygen and Carbon Dioxide exchange
Water balance
Metabolic waste
Infectious agents
Extremes in temperature
A good approach would be to think about the way the organism responds to these stresses and think about the systems involved.
Good luck
DO NOT USE AN EXISTING ORGANISMS
Thank you for the help.

A. the organisms may have to compete directly
B. one organism usually migrates to a new habitat
C. the two organisms will always form a symbiotic relationship
D. both organisms will disappear from the habitat
In his experiments with two species of paramecia, G. F. Gause proved that two competitors cannot coexist on the same limited resources. This outcome demonstrated the principle of
A. symbiosis
B. intraspecific competition
C. succession
D. competitive niche
When two species compete, the niche that each species ultimately occupies is its
A. competitive niche
B. exclusive niche
C. fundamental niche
D. realized niche