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- 1. Multiple Choice
Which category of organisms is correctly described in this table?
A
B
C
D
- 2. Multiple Choice
What limits the length of a food chain in an ecosystem?
The size of the individual organisms
Competition between organisms
The loss of energy between trophic levels
Natural selection
- 3. Multiple Choice
What are characteristics of species?
I and II
I and III
II and III
I, II and III
- 4. Multiple Choice
The statement is about the role of some bacteria in ecosystems. What mode of nutrition is described?
They are autotrophs
They are consumers
They are saprotrophs
They are detritivores
- 5. Multiple Choice
The diagram represents a pyramid of energy. What level does the letter X represent?
Light
Primary consumers
Abiotic environment
Producers
- 6. Multiple Choice
What is the classification of an organism that is able to make organic compounds from inorganic nutrients?
Autotroph
Consumer
Detritivore
Saprotroph
- 7. Multiple Choice
What could be represented by arrows 1, 2 and 3?
1 - death of consumers, 2 - cell respiration in saprotrophs, 3 - Cell respiration in producers
1 - death of consumers, 2 - incomplete decomposition, 3 - photosynthesis in producers
1 - cell respiration in saprotrophs, 2 - incomplete decomposition 3 - photosynthesis in producers
1 - cell respiration in consumers, 2 - cell respiration in saprotrophs, 3 - Cell respiration in producers
- 8. Multiple Choice
A bacterial population with no resistance could develop into a bacterial population with some resistance to an antibiotic. Which event could lead to this?
Antibiotic resistance was inherited from an ancestral population
An antibiotic resistance plasmid is received from a bacterium in another population
The enzyme needed for antibiotic resistance is received from a bacterium in another population
The bacteria have mutated in response to antibiotics in the environment
- 9. Multiple Choice
Euglena is a unicellular organism that feeds on bacteria and uses CO2 as a carbon source. Which described the nutrition of this organism?
Autotrophic only
Heterotrophic only
Saprotrophic only
Autotrophic and heterotrophic
- 10. Multiple Choice
What is lost between trophic levels and cannot be recycled?
Heat
Nitrogen
Carbon compounds
Biomass
- 11. Multiple Choice
All the organisms that live and interact in an ecosystem
Population
Community
Habitat
Interdependent
- 12. Multiple Choice
Non-living conditions that can influence where plants or animals live e.g. temperature / amount of light
Abiotic factors
Biotic factors
Mutualism
Biological control
- 13. Multiple Choice
What is a square called that we use to sample populations?
grid
quadrat
cube
tricep
quarter
- 14. Multiple Choice
Why do scientists use sampling techniques to gather population data rather than counting everything?
scientists are lazy
sampling is more efficient and achievable
sampling is more accurate
scientists prefer estimations
sampling is cheaper
- 15. Multiple Choice
What type of population would you measure using a quadrat?
- 16. Multiple Choice
What is the best way to place a quadrat?
Place it where you like
Divide the sample area into a grid and use a random number generator to choose a square.
Throw the quadrat so it's random
Divide the sample area into a grid and choose a square.
- 17. Multiple Choice
A symbiotic relationship where both organisms benefit.
mutualism
commensalism
parasitism
predation
- 18. Multiple Choice
A symbiotic relationship where one organism benefits and the other is harmed.
parasitism
mutualism
commensalism
predation
- 19. Multiple Choice
The graphs show how the number of mice predators (animals that eat mice) and the food source of the mice (plants) changed from 1996 to 2002.
Based on this information about predators and food, which year would you predict would have the highest population of mice?
1996
1998
2000
2002
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