G6 EXAM REVISION

If an existing ecosystem is destroyed, what will follow?

• Primary Succession

• Secondary Succession

• Climax

• Different type of biome

Both owls and snakes preying on mice in a forest is an example of

• Mutualism

• Parasitism

• preditation

• Competition

Which type of Biodiversity can you see?

• Species

• Ecosystem

• Genetic

• All

Name three factors that can result in a decrease in the size of a population.

• Nothing can decrease the size of a population

• Decrease in food and water

• Lack of space

• Lack of food, water and space

Reclamation is the process of restoring land disturbed by

• Mining

• Deforestation

• Volcanoes

• Eutrophication

how might a lake suffering from eutrophication affect a population of fish

• The population will grow

• The population will suffer

• The population will not be affected

• The population will waver

Identify two ways in which reusing materials can protect biodiversity?

• 1-Reduce amount of resources used 2-Reduce the amount of landfill

• 1-Increase the amount of resources used

  2-Increase the amount of landfill

• 1-Increase the amount of resources used

  2-Reduce the amount of landfill

• 1-Reduce amount of resources used 2-increase the amount of landfill

Which of the following does not describe an ecosystem in a state of dynamic equilibrium?

• An ecosystem that is constantly changing.

• An equilibrium that becomes unbalanced.

• An ecosystem that can return to a balanced state.

• An ecosystem that can respond to disruptions.

Which of the following is NOT an example of how bacteria aid in the nitrogen cycle?

• nitrogen fixation

• breaking down the tissue of dead organisms

• changing nitrogen compounds into atmospheric nitrogen

• infecting tissue

Which correctly describes a difference between prokaryotic and eukaryotic cells?

• Only prokaryotic cells have vacuoles.

• Only eukaryotic cells have their genetic material surrounded by a lining.

• Eukaryotic cells are smaller than prokaryotic cells.