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ENWC 201 Final Exam with Complete Solutions

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ENWC 201 Final Exam with Complete Solutions What is an animal's niche? How many dimensions can a niche have? Can animals share a niche? Answer-An animal's niche is the functional role of an organism considered in the environment in which it lives, its "job." A niche is multidimensional. No t...

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  • August 8, 2024
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ENWC 201 Final Exam with Complete Solutions
What is an animal's niche? How many dimensions can a niche have? Can animals share a niche?
Answer-An animal's niche is the functional role of an organism considered in the
environment in which it lives, its "job." A niche is multidimensional. No two organisms can
occupy the same niche at the same time in the same place.




What is a specialist vs a generalist? Answer-A specialist fits into their environment tightly
and there is no room for dealing with changes or for colonizing different habits; they are good at
one specific thing. A generalist adapts to a wide range of environmental circumstances and food
sources



What is logistic growth? What limiting factors might lead to a given (K) carrying capacity?
Answer-Logistic growth is the kind of population growth where the growth rate
constantly decreases with the increasing number of individuals. When the population reaches
it's max, the growth rate becomes zero. Factors such as food, water, and shelter, ass well as an
excess in predator are limiting factors that might lead to a given carrying capacity.



What is the energy pyramid? What is at the bottom? What is at the top? Where is the most
energy and the least energy? Where is the most biomass and least biomass? Where is the
highest number of individuals and lowest number? Answer-The energy pyramid is a
graphical model of energy flow in a community. Producers are at the bottom while tertiary
consumers are at the top. The most energy is at the bottom and the least energy is at the top.
The most biomass is at the bottom and the least biomass is at the top. The different levels
represent different groups or organism that might compose a food chain.

,ENWC 201 Final Exam with Complete Solutions

What are the two key components of an animal's habitat? Answer-The two key
components of an animal's habitat are food and shelter




What is natural selection? Answer-Natural selection is the process that determines which
individuals will pass on their genes to the next generation




What are Biomes? Answer-Biomes are the type of habitat an animal lives in. e.g. forest,
tundra, desert




How does biodiversity change as we get nearer to the poles or conversely, closer to the
equator? Answer-less biodiversity nearer to the poles, more biodiversity as you get closer
to the equator: can sustain more life




What are ecosystem services? Answer-Provisioning: food, timber, fuel, fibers, soil, water,
etc.

Regulation: climate regulation, carbon sequestration, water purification, etc.

Pollination

Supporting: maintain the provisioning and regulating services

Nutrient cycling

Seed dispersal

Cultural: recreational, spiritual, cultural

, ENWC 201 Final Exam with Complete Solutions

What is a K strategist? Answer-K-strategist

Large organisms

Long lived

Produce few offspring

Extensive parental care

Low juvenile death rate

Occupy stable environments




What is an r-strategist? Answer-r-strategist:

Small organisms

Short-lived

Many offspring

Limited parental care

High juvenile mortality

Exploit unstable environments




What is the Pleistocene overkill? Answer-The Pleistocene overkill is the excess hunting of
megafauna, which killed its species as well as the predators that hunted it.




What did Teddy do to earn his term in office being coined as the Golden Age in Conservation?
Answer-In 1903, Roosevelt initiated what was to become the National Wildlife Refuge

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