Ecology HW

Are you ready

• yes

• no

Members of a species in a defined area

• Ecosystem
• community
• biodiversity
• population

Which statement concerning an ecosystem is correct?

• It can exist with or without a constant source of energy input.

• It must contain consumers but can exist without producers.

• It involves interactions between biotic and abiotic factors

• It can exist on land, but it cannot exist in lakes, rivers, or oceans.

An environment can support only as many organisms as the available energy, minerals, and oxygen will allow. Which term is best described by this statement?

• biological feedback

• carrying capacity

• homeostatic control

• biological diversity

Energy for this ecosystem originally comes from

• water

• consumers

• sunlight

• plants

What impact do the amounts of available energy, water, and oxygen have on an ecosystem?

• They act as limiting factors.

• ]They are used as nutrients.

• They recycle the residue of dead organisms.

• They control environmental temperature.

Knowing the type of food consumed by an organism helps to identify the role of the organism in the community. This role is known as its

• nesting site

• territorial range

• biomass

• niche

Which sequence shows increasing complexity of levels of ecological organization?

• biosphere, ecosystem, community

• biosphere, community, ecosystem

• community, ecosystem, biosphere

• ecosystem, biosphere, community

An ecosystem will most likely remain stable if

• it has more predators than prey

• it has a high level of biodiversity

• biotic factors decrease

• finite resources decrease

Cutting down a rain forest and planting agricultural crops, such as coffee plants, would most likely result in

• a decrease in biodiversity

• an increase in the amount of energy recycled

• a decrease in erosion

• an increase in the amount of photosynthesis