7th Science DCP 3 Review

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• B

• C

• D

What are the 3 domains of life?

• Bacteria, Archaea, Eukarya

• Prokaryotes, Eukaryotes, Bacteria

• Plant Cells, Animal Cells, Microscopic Fungi

• I am so confused

In the energy pyramid, each level receives 100% of the energy from the level below it.

• True

• False

Both primary and secondary succession begin with pioneer species that

• use up all the existing resources and prevent establishment of non-native organisms

• modify the area and allow larger and more complex organisms to appear

• change the area and make it safer from predatory organisms

• invade the area so that new organisms cannot be established

Frederick is studying how ecological succession will change a freshly-plowed piece of land. Which data table represents what Frederick is most likely to record about the plant life in each stage of ecological succession?

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What is pictured in the diagram?

• A food web
• A food chain
• An energy pyramid

• A

• B

• C

• D

When an ecosystem contains many different species, there are usually a high number of links in its food web. How does this affect the sustainability of the ecosystem?

• Typically, if one link in the food web is removed, the ecosystem will no longer exist.

• Typically, if one link in the food web is added, the ecosystem will destabilize.

• Typically, if one link in the food web is removed, the ecosystem will remain stable.

• Typically, if one link in the food web is added, the ecosystem will change its location.

Which ecosystem would most likely survive if the grasses were destroyed by a plant virus?

• Ecosystem 2, because there are not many predators.

• Ecosystem 2, because the grasses could grow back quickly.

• Ecosystem 1, because there is a variety of producers that support the ecosystem

• Ecosystem 1, because there are fewer primary consumers.

Tropical rain forests have the greatest biodiversity of any type of land ecosystem. How does biodiversity contribute to the sustainability of an ecosystem?

• All of the above

• The presence of a variety of herbivore species that can feed on a large number of different producer species helps ensure abundant prey for predators in the ecosystem.

• Greater genetic variation within species makes it more likely that some individuals will survive a disease outbreak.

• The presence of more species with different adaptations makes it more likely that some organisms will survive an ecological disaster.