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28 Cards in this Set
- Front
- Back
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The number of different species in an area is called its ....
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biodiversity
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A species that influences the survival of many other species in an ecosystem is called .....
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a keystone species
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If a keystone species disappears from an ecosystem, what will happen?
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The system will change or might even crash
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Three things that affect biodiversity are ____, ____, & ____
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niche diversity
climate area |
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Large areas contain (more or less??) species than small areas.
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more
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The number of species (increases or decreases??) as you move from the poles to the equator.
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increases
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The most diverse ecosystems on land are the ....
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tropical rain forests
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The most diverse ecosystems in the ocean are....
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coral reefs (& second in diversity to TRFs)
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Having a large niche diversity means...
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having a lot of different niches
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The job of an organism or its way of life is referred to as its....
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niche
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Structures in an organism's cells that carry its hereditary information are called....
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genes
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Plant species with diverse gene pools are (more likely or less likely??) to resist parasites.
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more likely
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Organisms that live on another organism are called...
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parasites
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Plant species with narrow gene pools are (more likely or less likely??) to resist drought.
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less likely
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When ecosystems haven't had rain in a long time, we call it a .....
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drought
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If a plant gets sick, it will be less likely to survive the sick if it has a ____ gene pool.
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small
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When the last member of a species has disappeared from the Earth, then we say it has gone....
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extinct
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A species that could become extinct in the near future is said to be....
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endangered
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A species that could become endangered in the near future is said to be....
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threatened
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Arrange these from bad to worst: extinction, threatened, endangered
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threatened = bad
endangered = worse extinct = worst |
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A natural event such as ____ can cause extinction.
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volcanic eruption
meteor impact climate change |
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___ ____ occurs when ecosystems get chopped into small areas and become isolated from one another.
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habitat fragmentation
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The act of illegally killing or removing wildlife from their habitats is called...
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poaching
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The loss of natural habitat is called...
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habitat destruction
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Where a species lives (not what it does to make a living) is called its....
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habitat
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What's the easier and better way to protect the biodiversity of an ecosystem -- protect the individual species or protect the habitat?
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protect the habitat
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When a sea otter is removed from his ecosystem, the urchins aren't eaten, causing urchins to multiply and eat up all the kelp so there's nothing left for others to eat. Thus, the otter is a ____ species.
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keystone
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All the individual differences in genes among members of a species make up the ___ ____ of that species.
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gene pool
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