Ecology Quiz (For Import)

Which level in this food chain has the lowest amount of biomass or matter?

• Tuna
• Small Fish
• Zooplankton
• Phytoplankton

Roughly 10% of the available energy is transferred from one level to the next in a food chain. If 10,000 energy units are available to phytoplankton, how many energy units are available to zooplankton?

• 0
• 10
• 100
• 1,000

In the food web pictured below, about how many different food chains make up the food web?

• One Food Chain
• Two Food Chains
• Three Food Chains
• More than Three Food Chains

In the diagram below, which living organism is the decomposer?

• Bacteria
• Mice
• Owl
• Plants

If a disease strikes the snake population and lowers the population size, what will be the initial effect on the hawks and rabbits?

• The hawks and rabbits will decrease.
• The hawks and rabbits will increase.
• The hawks will increase but the rabbits will decrease.
• The hawks will decrease but the rabbits will increase.

Owls eat mice; mice eat grass and seeds. Which food chain is correct?

• Grass → Mice → Owl
• Grass → Owl → Mice
• Mice → Owl → Grass
• Mice → Grass → Owl

The graph below shows double the average population size for the snakes at the start. Which other organism decreased in numbers because of the doubled snake population?

• Grass
• Hawk
• Rabbit
• None

In a Prairie ecosystem, the grass is eaten by prairie dogs, which are eaten by ferrets, which are eaten by foxes. The graph below shows the four populations over 20 years. What can explain the drop in the grass population the first 2 years?

• There were too many ferrets at the start.
• There were too many foxes at the start.
• There were too many prairie dogs at the start.
• There was a disease that infected the grass population.