1-5
4. Which energy levels could contain carnivores?
C. C and D
7. Which type of model provides the most complete representation of the feeding relationships within a community?
D. a food web
13. Which ecological term best describes the polar bears in the cartoon?
C. carnivores
18. The mouse population would most likely decrease if there were...
D. a decrease in the amount of available sunlight
2. In an ocean the growth and survival of seaweed, small fish and sharks depends on abiotic factors such as...
A. sunlight, temperature and minerals
8. What is an appropriate title for this diagram?
A. Energy flow in a Community
14. in most habitats, the removal of predators will have the most immediate impact in a population of...
C. herbivores
16. Which process provides the initial energy to support all the levels in the energy pyramid shown?
B. photosynthesis
21. Predict how one of the populations in the food web will most likely change if the yellow perch population increases over a period of 3 years
1. the zooplankton population will decrease if the yellow perch population increases.
2. the algae population will increase.
5. In order for an ecosystem to remain stable there must be...
B. interrelationships and interdependencies among organisms.
6. Which statement best explains why the actual population growth is less than the potential growth?
A. resources in the environment are limited.
12. in a forest community, a shelf fungus and a slug live on the side of a decaying tree trunk. the fungus digests and absorbs materials from the tree, while the slug eats algae growing on the outside of the trunk. these organisms do not compete with one another because they occupy..
A. the same habitat, but different niches
17. Which letter indicates the carrying capacity of the environment?
D. D
22. Explain why each level of the pyramid decreases in area from bottom to top.
1.There is less energy available at each level.
2. energy is being lost as heat at each level
1. Which terms describe temperature in this investigation?
A) abiotic factor and independent variable
10. Which change would most likely reduce the population size of the carnivorous fish?
C. an increase in the raccoon population
11. The dense needles of Douglas fir trees can prevent most light from reaching the forest floor. This situation would have the most immediate effect on..
A. producers
19. Which graph illustrates changes that indicate a state of dynamic equilibrium in a mosquito population?
B.
23. According to the table which organism can be classified as both an herbivore and a carnivore?
small fish
3. what impact do the amounts of available energy, water and oxygen have on an ecosystem/
A. They are limiting factors
9. A food web is more stable than a food chain because a food web...
C. includes alternative pathways for energy flow
15. Which statement best describes this ecosystem?
A. the ecosystem is most likely unstable
20. Which statement best describes energy in this food web?
B. The energy content of level A depends on energy provided from an abiotic source.