biodiversity

What does biodiversity mean?

• Only one species in an area.
• The different amount of species in an area
• All abiotic life
• Nitrogen fixation

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A population is

• a group of similar species in different areas

• a group of the same species in the same geographic area.

• a group of several species in the same geographic area

• a group of several species along with their abiotic factors in a small area.

Why is biodiversity important in fighting disease in food crops?

• It prevents one disease from wiping out an entire food crop.
• It prevents habitat loss of native species.
• It provides different foods for different populations.
• It prevents fungal disease from wiping out corn crops.

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Forests are often preserved to protect biodiversity. This helps preserve the unique characteristics of the organisms that live there. Sometimes these forests are divided into separate sections that are spread out instead of one continuous forest. This is known as forest fragmentation. Which types of organisms will be the least likely to be affected by forest fragmentation?

• herbivorous birds that are able to migrate great distances
• omnivores that hibernate in winter in order to conserve energy
• omnivores that burrow underground deep in to the soil.
• herbivorous mammals that are dependent upon specific plants for food

During the early settlement of the United States, pioneers cut down large tracts of forests on the east coast to use for home construction, for firewood, and to create cleared spaces to plant crops.What was the most likely effect of this kind of action?

• decreased plant and animal diversity
• decreased human populations
• decreased carbon dioxide production
• increased organism biodiversity.

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Which of the following describes the importance of biodiversity to an ecosystem?

• a. People like to be able to see all the different plants and animals
• b. If there aren�t all the different species, there will be resources that aren�t being used
• c. Biodiversity is not as important as many people think
• d. Biodiversity can help minimize the effects of losing a species.

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A plant nursery only grew one type of tomato. All of their tomatoes died from the same disease. What was most likely true of the tomato plant population?

• a. It had too little biodiversity
• b. It had a lot of resistance to disease
• c. It had a few plants that were resistant to disease
• d. It had too much genetic variation

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Which human activity would be most destructive to the biodiversity of the biosphere?

• a. The burning of wood and coal in rural areas
• b. The release of species of freshwater trout in lakes
• c. The removal of plants from the food webs they support
• d. The removal of erosion barriers from forest boundaries

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What affect will continued rise in global temperature most likely have on worldwide biodiversity?

• a. It will have no effect as there is plenty of time for organisms to adapt
• b. It will increase due to warmer temperatures
• c. It will increase due to greater plant production from more CO2
• d. It will decrease due to massive habitat destruction

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In what way are humans most impacting the biodiversity of ecosystems around the world?

• a. We are putting too many organisms in zoos or keeping them as pets
• b. We are increasing biodiversity by breeding new species
• c. We are destroying the habitats of a large number of species
• d. Recreational hunting

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