Ecology 1 Review

This diagram shows a food web in a large park. Each circle represents a different species in the food web. Which of the organisms in the food web could be referred to as primary consumers?

• 2, 3, and 4 only
• 2, 5, and 7 only
• 5 and 6 only
• 7 only

Which of the following explains why producers are always found at the beginning of the food chain?

• Producers convert light energy into chemical energy via photosynthesis.
• Producers have less biomass than consumers.
• Consumers are larger than producers.
• Consumers are eaten by a variety of producers.

Which organism in the diagram is classified as a producer?

• flying fish
• tuna
• zooplankton
• phytoplankton

What type of growth is shown in the diagram?

• exponential growth
• logistic growth 
• predator-prey cycle
• boom-bust curve

Largest number of individuals of a population that the environment can support...  

• carrying capacity
• population crash
• lag phase
• mutualism

What type of population growth is depicted in this graph?

• exponential growth model

• logistic growth model

• performance curve

Which group is not represented in the food web?

• producers

• primary consumers

• secondary consumers

• decomposers

What do the arrows in the food chain indicate about the flow of energy in an ecosystem?

• Energy is continuously recycled by the organisms in an ecosystem.

• Energy flows in one direction in an ecosystem, from producers to consumers.

• More of the available energy in an ecosystem is given to large animals than to small animals.

• Organisms at the end of the food chain receive more energy than those at the beginning.

The diagram shows part of an aquatic food web for a stable lake ecosystem in Connecticut. What is the source of energy for the algae?

• waves

• sunlight

• bacteria

• rotifers, water fleas and tadpoles

Which organisms have the most available energy in an energy pyramid?

• Producer
• Consumer
• Decomposer
• Scavenger