Unit 1 Ecology

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Unit 1 Ecology

• Biology Review PowerPoint

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Review Question 1

• Which of the following chain of energy flow
  would give the end consumer the least amount of
  energy?
• A. Grass? grasshopper ? robin ? hawk
• B. Grass ?mouse ? wolf
• C. Grass ?grasshopper ?frog ?snake ?hawk
• D. Grass? mouse ? snake ? hawk

Where does 90 of the Energy lost actually go
when E is transferred from one trophic level to
the next?
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Review Question 2

• Fungi, such as mushrooms and molds, get their
  nutrition primarily by
• A producing food through chemosynthesis
• B preying on other organisms
• C decomposing dead organic matter
• D parasitic relationships with plants

Why are decomposers important?
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Review Question 3

• If a population grows larger than the carrying
  capacity of the environment, the ______.
• A death rate may rise
• B birth rate may fall
• C birth rate may rise
• D death rate may fall

What is carrying capacity?
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Review Question 4

• NY Regents
• BIO

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Review Question 6
An example of a population is- 1 all the Zapus
hudsonicus in California 2 all the fish in Lake
Erie 3 the number of different species of Felis
in a geographic area 4 the number of maples,
white oaks, spruce, gray squirrels, and owls in a
forest
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Review Question 7
Which of the following practices is MOST likely
to slow the buildup of CO2 in the
atmosphere? From Georgia-End-of-Course
Assessments, Spring 2004 A increased use of
tropical rain forest areas for
agriculture C decreased pesticide use in favor
of biological controls B increased
use of genetically engineered plants D decreased
use of fossil fuels
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Review Question 8
The maintenance of a self-sustaining ecosystem
requires a - 1 constant temperature 2 greater
number of herbivores than producers 3
cycling of materials between organisms
and their environment 4 soil that is acidic
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Review Question 9
A food web is shown below
Which organisms are necessary for the recycling
of Nitrogen? 1 frogs
2 snakes 3 grasshoppers
4 bacteria
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Review Question 10
In a forest ecosystem, which is an abiotic
factor? From North Carolina End-of-Course
Assessments, Goal 5 A amount of rainfall B type
of trees C number of reptiles D size of deer
Why is this considered abiotic?
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Review Question 11
What is the main cause of fish kills in rivers
polluted by fertilizers? From Virginia SOL
Assessments, 2002 Biology A Decreased mineral
sources C Increased water temperatures B Decreas
ed oxygen levels D Increased water levels
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Review Question 12
The diagram below shows a food pyramid.
Which level of the food pyramid contains
consumers with the least biomass? 1 snakes 3
crickets 2 frogs 4 green plants
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Review Question 13
Which letter represents a photosynthetic organism?

1. A
2. B
3. D
4. E

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Review Question 14
Study the table below

• Which property of the local ecosystem is being
  described?
• a. Food production c.
  Biodiversity
• b. Abiotic conditions d. Energy
  interdependence

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Last Question!
The above graph shows how dissolved O2 and CO2
levels changed in a pond over a 24-hour period.
What caused the decrease in O2 concentration
during the night? A increased evaporation
B decreased photosynthesis C increased
respiration D decreased
temperatures