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BIO 182 EXAM 3 | ALL QUESTIONS AND CORRECT ANSWERS | ALREADY GRADED A+ | VERIFIED ANSWERS | LATEST VERSION (JUST RELEASED) | ARIZONA STATE UNIVERSITY$20.99
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BIO 182 EXAM 3 | ALL QUESTIONS AND CORRECT
ANSWERS | ALREADY GRADED A+ | VERIFIED
ANSWERS | LATEST VERSION (JUST RELEASED) |
ARIZONA STATE UNIVERSITY
How do species coevolve? ---------CORRECT ANSWER-----------------when
an evolutionary change in one species creates a novel selective pressure
that exerts an evolutionary change in another species. The response of the
second species then feeds back to influence the evolution of the first
species. And thus, the cycle continues until neither species has the
heritable variation needed to evolve or they cease to interact.
What is diffuse coevolution? ---------CORRECT ANSWER-----------------a
network of species undergoes reciprocal evolutionary change through
natural selection
What is coevolution? Give an example. ---------CORRECT ANSWER---------
--------Two organisms that evolve in response to each other such as
flowering plants and their pollinators are said to have undergone
coevolution.
What is one on one coevolution? ---------CORRECT ANSWER-----------------
A single species evolves in response to a second species
How do you predict how an interaction between species affects the coevol.
of their niches? ---------CORRECT ANSWER-----------------depending on
how many competition there is already.
,What is niche partitioning? ---------CORRECT ANSWER-----------------
Process which natural selection drives competing species into using
different resources
What is a trophic level? ---------CORRECT ANSWER-----------------Each step
in a food chain or food web
What is a keystone species? ---------CORRECT ANSWER-----------------a
species on which other species in an ecosystem largely depend, such that
if it were removed the ecosystem would change drastically.
What determines the productivity of a community? ---------CORRECT
ANSWER-----------------Sunlight, water, trace elements (nitrogen) and
minerals that plants can collect from the ground.
Why would tropic areas have a lot more rain and temperatures? ---------
CORRECT ANSWER-----------------because of the tilt of the earth at 23.5
and how much light is hitting the earth at different points.
What is Nitrogen Fixation? ---------CORRECT ANSWER-----------------the
chemical processes by which atmospheric nitrogen is assimilated into
organic compounds, especially by certain microorganisms as part of the
nitrogen cycle.
What is the nitrogen cycle? ---------CORRECT ANSWER-----------------The
transfer of nitrogen from the atmosphere to the soil, to living organisms,
and back to the atmosphere
, What are the steps in nitrogen cycle? ---------CORRECT ANSWER------------
-----1. Nitrogen fixation. 2. Once insoil, the roots of the plants absorb it. 3.
Consumers eat producers and reuse the nitrogen. 4. Decomposers release
nitrogen from dead organisms into soil. 5. Denitrification.
How would you estimate the number of whales in a population? ---------
CORRECT ANSWER-----------------mark and recapture
What is a population? ---------CORRECT ANSWER-----------------a group of
individuals of the same species living in the same area at the same time
True or False? Sampling quadrats would be the better method for
estimating the number of whales in a population. ---------CORRECT
ANSWER-----------------false
True or False? Mark and recapture would be the better method for
estimating the number of saguaros in a population. ---------CORRECT
ANSWER-----------------true
The human population has grown ____________________ ---------
CORRECT ANSWER-----------------exponentially
Explain what exponentially growing means? ---------CORRECT ANSWER---
--------------Compounded, like compounded interest
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