Think You Got it Down?
Test your knowledge again:
Ecology: Organisms and Their Environments: You Are Our Density Quiz
Think you’ve got your head wrapped around Ecology: Organisms and Their Environments? Put your knowledge to
the test. Good luck — the Stickman is counting on you!
Q. An organism that has a low risk of dying young will probably have which type of survivorship curve?
Types I and II
Q. How does nitrogen enter a food chain?
Plants extract it directly from the atmosphere.
Plants extract it directly from the soil.
Bacteria extract it directly from the atmosphere.
Bacteria extract it directly from the soil.
It drops to the ground from the air.
Q. Food chains and food webs are related in what way?
Food webs are simplified food chains.
Food webs are complexes of multiple food chains.
Food chains are simplified food webs.
Food chains are complexes of multiple food webs.
They are not related.
Q. Most of the nitrogen in the world is found in
Q. For a species, what is a possible consequence of competitive exclusion?
Freedom from competition
The first and second choices
The first and third choices
Q. The human population size is currently about 7 billion. If the human growth rate decreased from 0.012 to 0.001 today, how many people would be added to the human population next year?
About 3 million
About 23 million
About 7 million
About 15 million
About 1 billion
Q. An age pyramid for a country has a small base, bulges in the middle, and has a top that is slightly larger than the base. The country is likely
Q. What happens to population growth rate as population size approaches the carrying capacity?
It approaches one.
It approaches zero.
It becomes negative.
Q. Density-dependent factors lead to
None of the above
Q. An energy pyramid for a community would contain which of the following information?
Which species are eating each other
The number of trophic levels
The number of consumers
The number of producers
The number of cats