Ecology

Select the list below that would be an example of a population.

• a nest of mockingbirds, some bullfrogs, a pond, and a sandy shore

• a warm, humid climate with plenty of rainfall

• a school of sunfish

• bees and wasps around a group of purple cornflowers

In the nitrogen cycle, which organism is primarily responsible for nitrogen fixation?

• trees

• fungi

• humans

• bacteria

Some species are symbiotic to each other, meaning they live together in a close, long-term association. What is the term for a symbiotic relationship in which both participating species benefit?

• Mutualism

• Commensalism

• Parasitism

• Predation

Which level in an energy pyramid contains the highest amount of total available energy?

• Producers

• Primary Consumers

• Secondary Consumers

• Tertiary Consumers

Which of the following best describes an ecosystem?

• a region with a distinct climate

• all the living organisms in an area

• all of the living organisms in an area, along with their non-living surroundings

• all of the living organisms of the same species in an area

Lions and hyenas often use and fight for the same resource, food, in the savanna. What type of community interaction does this describe?

• Competition

• Parasitism

• Mutualism

• Predation

Identify the abiotic factor.

• Water

• Bacteria

• Tree

• Moss

A relationship where one organism captures and eats another is called

• Predation

• Competition

• Mutualism

• Parasitism

The trophic levels on the energy pyramid below show that

• the same amount of energy is available at each level of the energy pyramid

• energy is not transferred between organisms in an ecosystem

• there is a great amount of energy gained as it travels up the energy pyramid

• there is a great amount of energy lost as it travels up the energy pyramid

Savannas, deserts, grasslands, and temperate forests are examples of

• ecosystems

• communities

• biomes

• biospheres