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WorksheetsAP Biology Unit 8 Review
Total questions: 12
Worksheet time: 15mins
Which statement best describes energy transfer in a food web?
energy is transferred to consumers which convert it to nitrogen compounds and use it to synthesize amino acids
energy from producers is converted into oxygen and then converted to consumers
energy from the sun is stored in green plants and transferred to consumers
energy moves from autotrophs to heterotrophs to decomposers, which convert it into a form producers can use again
Reorder the following levels of organization from Smallest to BIGGEST
Organism
Population
Community
Ecosystem
Biosphere
The ecosystem includes all of the (a) factors, such as plants, animals and bacteria, as well as all of the (b) factors, such as rocks, water and sunlight.
Match the following types of symbiosis:
When two species are both need the same resource
- / -
Mutualism
When two species help each other survive
+ / +
Commensalism
When one species benefits and the other is unaffected
+ / 0
Parasitism
When one species benefits at the expense of the other
+ / -
Competition
Lynx eat rabbits. The graph shows change in population size for the rabbits. Draw a line to show the change in population for the lynx.
What percent of available energy is generally passed from one trophic level to the next?
1%
10%
50%
80%
Match the following trophic levels to their descriptions
breaks down dead matter from all trophic levels
Decomposer
makes its own food, often using the sun's energy
Producer
eats producers (herbivore)
Primary consumer
eats primary consumers (carnivore)
Secondary consumer
the top of the food chain - consumer
Apex predator
A species that has a disproportionate impact on the ecosystem compared to its population size and generally benefits the other organisms is which of the following?
Keystone species
Invasive species
Parasitic species
Extinct species
The carbon cycle is an important (a) cycle in all ecosystems. In this syscle, (b) is absorbed from the atmosphere by plants doing photosynthesis. Animals receive carbon in the form of (c) by eating plants. Cellular respiration in both plants and animals releases (d) back into the atmosphere.
What is the main gas in the atmosphere that we breathe?
Nitrogen
Oxygen
Carbon dioxide
Helium
When (a) species enter an ecosystem, this often leads to a (b) in biodiversity because of the increased competition for the native species.
According to the graph, how many years did it take the white-footed mouse population to reach its carrying capacity?
3
5
7
12
