4th Nine Weeks Practice

When there is higher biodiversity

• more organisms are likely to die because they can't adapt to environmental changes.
• there is less diversity.
• there is more diversity and higher sustainability of life.
• there is more diversity and lower sustainability of life

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A small marine area has phytoplankton as its only producer.  Should the marine biologist be concerned about this ecosystem?

• No the fish do not need the phytoplanton. Since there are so many fish, there is high biodiversity.
• Yes, this ecosystem has low biodiversity.  Without a producer the herbivores will die out leaving no food.
• Yes, this system has high biodiversity; however the fish can adapt and get food from another source.
• Yes, the fish will overate to get all of the phytoplankton that is left, then they will die.

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How do biodiversity and sustainability work together?

• The lower the biodiversity the greater the sustainability.
• The higher the biodiversity, the less sustainable the ecosystem
• The higher the biodiversity, the greater the sustainability.
• Biodiversity has nothing to do with sustainability.

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What has a higher biodiversity: a rain forest or a desert?

• Rain forest

• Desert

• They have a similar biodiversity

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Suppose that a new predator of the rabbit migrated to this ecosystem. What is the most likely initial effect on the other organisms?

• More competition among the mice for food

• More competition among the hawks for food

• Less competition among snakes for food

• Less grass available for food

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The owl receives energy from which organisms?

• grasshopper and mouse
• mouse and rabbit
• rabbit and butterfly
• butterfly and frog

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If star cactus was removed from the food web, what would be a possible outcome?

• The rabbit population would increase since there would be more food available

• Grasshoppers would die out since there is no food left for them

• Kangaroo rat population would die out since they lost their only food source

• Tarantulas would overpopulate the area

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What would happen to the food web if an invasive producer was introduced and was able to outcompete the others?

• Star cactus, grass, and cactus would increase in population

• There would be no change in the food web

• There would be a decline in star cactus, grass, and cactus.

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Sunlight provides what type of energy?

• chemical energy

• thermal energy

• radiant energy

The products of photosynthesis are...

• glucose and oxygen

• carbon dioxide and water

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