Ecosystems Biomes and Adaptations

What does it mean to say there is equilibrium within an ecosystem?

• There are equal numbers of male and female organisms

• There are equal numbers of plants and animals

• A state of balance where the types of species living in an area are not changing rapidly.

• The ecosystem is unbalanced.

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Which ecosystem most likely has the greatest biological diversity and therefore the highest sustainability?

• a pine tree in which three groups of birds live

• a rainforest that has many different types of plants and animals

• a tundra region that has many penguins

• a tank that includes several goldfish

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Which of the following is an example of an interaction between a biotic and abiotic factor in an ecosystem?

• A deer drinks from a pond.

• A robin lays eggs.

• A fish eats an insect.

• Bacteria break down the remains of a dead plant

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Only a small amount of the energy consumed by an organism is available to flow to the next organism in a food web. Which of the following statements explains the reason for this?

• Primary and secondary consumers compete for food.

• There are many more consumers than producers in a food web.

• There are many more producers than consumers in a food web.

• Most of the energy is used for life processes.

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Each level of organization in an ecosystem is made up of parts. In a diagram of a coral reef ecosystem, which of the following is an example of the population level of organization?

• A group of sea anemones

• a colony of coral and a stand of sea grass

• seawater

• a clown fish

Which of the following statements best describes the relationship between ecosystems and biomes?

• An ecosystem may contain many biomes, and biomes within the same ecosystem are typically home to similar species of organisms.

• A biome may contain many ecosystems, and ecosystems within the same biome are typically home to similar species of organisms.

• Both biomes and ecosystems are characterized by their climate conditions and the communities that live in them; however, biomes refer to land environments and ecosystems refer to aquatic environments.

• Both biomes and ecosystems are characterized by their climate conditions and the communities that live in them; however, ecosystems refer to land environments and biomes refer to aquatic environments.

Visualize a diagram of a prairie ecosystem. Which choice lists the organism(s) at the community level of the prairie ecosystem?

• a group of prairie dogs

• a prairie dog

• prairie dog, badger, prairie chicken, snake, grass, trees, bison, clouds, sunlight

• prairie dog, badger, prairie chicken, grass

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Which of the following is an example of an abiotic factor in an ecosystem?

• roots

• grass

• birds

• sunlight

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An abiotic factor that affects the ability of a plant to meet its energy needs in an ecosystem is?

• oxygen

• sunlight

• grass

• soil

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Functions of animals that help them survive in their environment are –

• modifications

• characteristics

• adaptations

• behaviors

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