Ecology Quiz 3

Choose the consequence of carbon dioxide being released into the air:

• Loss of Biodiversity

• Rising Ocean Levels

• Health Problems

• All are correct

Biodiversity is best defined as:

• The variety of life in a habitat or ecosystem

• The life found on Earth

• All plants and animals on Earth

• Life in a particular ecosystem

Which of the following human activities can preserve the biodiversity of an ecosystem?

• urbanization

• use of pesticides and herbicides

• overfishing of the oceans

• creating natural parks and nature reserves

What effect does biodiversity have on a community?

• Biodiversity enables individual species to survive.

• Biodiversity enables communities to withstand changes.

• Biodiversity stabilizes the populations of species in the community.

• Biodiversity allows multiple advantageous traits to remain available for selection.

• All are correct

How do invasive species disrupt ecosystems?

• by crowding out native species

• by becoming an essential food source

• by causing habitat fragmentation

• by decreasing competition

In Australia, a hunter released rabbits to hunt. Rabbits have no natural predators in Australia and have caused major problems by eating native plants and altering the food web. The rabbit could be classified as:

• Community Species

• Population Species

• Invasive species

• Harmful Species

A graph of atmospheric carbon dioxide concentration over time is shown below. Scientists are investigating the cause of the large increase in atmospheric carbon dioxide concentration since about 1800. Which of the following provides the best explanation for the increase?

• Eruptions of large volcanoes.

• Use of fossil fuels by humans.

• Use of fossil fuels by humans.

• Natural fluctuations of the climate.

Biogeochemical cycles are the cycling of elements/molecules between ___________ and ____________ factors.

• living; nonliving

• bacteria; soil

• bacteria; soil

• bacteria; soil

Which of the following best describes the process in which plants use their roots to absorb nitrogen in the soil?

• Erosion

• Respiration

• Transpiration

• Assimilation

What is letter A in the diagram?

• Photosynthesis

• Respiration

• Combustion

• Death & Decay