Quiz # 2 (Assessment)

What is the difference between biotic and abiotic?

• Biotic are non-living things
• Abiotic are living organisms
• Biotic is life,
  Abiotic is non-living
• Biotic is non-living, Abiotic is living

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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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Food provides animals with the materials and energy they need for growth, warmth, and motion. Plants get material for growth mostly from air and water, and obtain energy from sunlight.

Producers provide food to consumers because ―

• many animals prefer eating plants to eating meat
• plants can easily make food from soil and water
• animals cannot produce their own food
• plants are more abundant in ecosystems

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A drought has hit this grassland biome. How will this effect the rabbit population?

• The rabbits will increase in number.
• The rabbit population will stay the same.
• The rabbit population will decrease.
• The rabbit population will become extinct immediately.

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Brown trout consume (eat) more tadpoles when the fly larvae reduce in number (decrease).  This proves...

• The dependence of organisms and biodiversity in an ecosystem
• Diversity increases as organisms decrease
• Losing an animal is good for ecosystems
• Changes in ecosystems create new organisms

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In this tundra food web, if grasses were removed what would happen to the sustainability of the ecosystem?

• There would be an overpopulation of arctic hares and lemmings.
• Polar bears would move to a new ecosystem
• The ecosystem would collapse because it lost its main producer
• Wildflowers would die out from the ecosystem

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Something that adds harmful substances to Earth's land, water, or air is a(n)

• decomposer

• biome

• pollutant

• atmosphere

Which of the following ecosystems would be the most stable over time?

Tundra. (17 species, 2,000 organisms) Tundra is the coldest of all the biomes. Plants are short and group together to resist the cold temperatures and are protected by the snow during the winter. Animals are adapted to handle long, cold winters and to breed and raise young quickly in the summer.

Tropical rainforest. (5,000 species, 150,000 organisms) The tropical rain forest is a forest of tall trees in a region of year-round warmth. An average of 50 to 260 inches (125 to 660 cm.) of rain falls yearly. Scientists estimate that more than half of all the world's plant and animal species live in tropical rainforests

Desert. (100 species, 10,000 organisms) Deserts cover about one fifth of the Earth's surface and occur where rainfall is less than 50 cm/year. There are relatively few large mammals in deserts because most are not capable of storing sufficient water and withstanding the heat. The dominant animals of warm deserts are reptiles.

• Tundra

• Tropical rainforest

• Desert

• These ecosystems are all the same

What does this picture represent?

• species diversity
• ecosystem diversity 
• genetic diversity
• biodiversity

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Globally, the leading cause of biodiversity loss is 

• invasive species
• poaching and overharvesting
• pollution
• habitat change and loss