Ecosystems and Ecological Succession

Ecosystems are defined as:

• A community of living organisms interacting with their physical environment.

• A group of animals living in a zoo.

• A collection of plants in a garden.

• A single species living in isolation.

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Ecological succession is defined as:

• the gradual process by which ecosystems change and develop over time

• the immediate extinction of all species in an ecosystem

• the sudden appearance of new species without any changes in the environment

• the process by which animals migrate from one ecosystem to another

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What is the study of the relationship between an organism and its environment called?

• Ecology

• Anatomy

• Genetics

• Physiology

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Ecology involves the scientific study of the interactions determining the ______ and abundance of organisms.

• distribution

• evolution

• respiration

• digestion

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Look at the image of a cheetah chasing a warthog. Which scientific field studies the interactions between these two animals and their environment?

• Chemistry

• Ecology

• Physics

• Astronomy

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Which of the following is the largest ecological level?

• Organism

• Population

• Community

• Biosphere

Fill in the blank: A group of different species living together in one area is called a _________.

• community

• population

• organism

• habitat

Which ecological level includes all living and nonliving things in a particular area?

• Ecosystem

• Population

• Organism

• Community

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Fill in the blank: A single living thing, such as a plant or animal, is called an _________.

• organism

• ecosystem

• cell

• habitat

Which ecological level is made up of individuals of the same species living in the same area?

• Community

• Population

• Ecosystem

• Biosphere