1. Biology Review PowerPoint
Unit 1 Ecology
Biology Review PowerPoint

2. 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?

3. Why are decomposers important?
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?

4. What is carrying capacity?
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?

5. Review Question 4 N Y R e g e n t s B I O
Ask: What is a heterotroph? Why is it not essential? Why should the terrarium be placed in a sunny area?

6. NY Regents

7. 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

8. 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

9. 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

10. Review Question 9
A food web is shown below:
Which organisms are necessary for the recycling of Nitrogen?
1 frogs snakes
3 grasshoppers bacteria

11. Why is this considered abiotic?
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?

12. 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 Decreased oxygen levels
D Increased water levels

13. Review Question 12 Which level of the food pyramid contains consumers
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

14. Review Question 13
Which letter represents a photosynthetic organism? A B D E

15. 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

16. 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