Species richness is

• a measure of how all of the individual organisms in an ecosystem are balanced between the different species.

• the total number of different species found in an ecosystem

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True or false: An ecosystem with high genetic diversity is healthier than an ecosystem with low genetic diversity.

• True

• False

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Define: Sustainability

• • Sustainability is the effort to minimize human impact on natural resources and species that exist in an ecosystem.

• • Sustainability is the effort to maximize human impact on natural resources and species that exist in an ecosystem.

• • Sustainability is the effort made by humans to use up natural resources and remove species that exist in an ecosystem.

• • Sustainability is the the use of all natural resources from an ecosystem.

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The level of biodiversity that involves a variety of habits and communities is _____ diversity.

• ecosystem

• population

• genetic

• species

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Biodiversity, aka biological diversity, usually refers to

• the same species in a general location

• the number of different species in a given area

• the number of animal species in a given area

• the number of plant species in a given area

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NGSS.MS-LS2-5

Which habitat exhibits the greatest biodiversity?

• A habitat with 15 different species with about 300 individuals each
• A habitat with 10 different species with about 75 individuals each
• A habitat with 4 different species with about 150 individuals each
• A habitat with only one species with about 2000 individual

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NGSS.MS-LS2-5

In a population of spiders there are three different sizes: small, medium, and large.

---The large spiders are easily seen by predators.

---Small spiders have a difficult time finding food.

Which best explains what will most likely happen to this population of spiders after many generations.

• The large AND small spiders will likely decrease in population,

  while the medium spiders will increase in population since competition from small and large spiders is gone.

• The large spiders will likely decrease in population, while the small and medium spiders will increase in population since competition from the large spiders is gone.

• The small spiders will likely decrease in population, while the medium and large spiders will increase in population since competition from small spiders is gone.

• The large spiders will likely increase in population since they are larger they outcompete small and medium spiders for mates and food.

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• ​ (a)    helps to resist disease and pests in crops. 

• This is because different ​ (b)   have different levels of ​ (c)   to diseases. The disease will affect (hopefully) just the single crop allowing the others to ​ (d)   .

• biodiversity
• crops
• resistance
• flourish

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​ (a)   causes loss of forest habitat​, which can cause species to move into a new ​ (b)   making them an ​ (c)   .  This can cause a shift in the ecosystem, which can lead to more loss of ​ (d)   or ​ (e)  

• deforestation
• ecosystem
• invasive species
• species extinction.
• habitat

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Positive effect of "water bottle deposit program"...​ (a)   In California, consumers get a CRV when recycling plastic, glass and aluminum bottles or cans. CRV stands for ​ (b)  

• Reduction of plastic in landfills
• Increase use of plastics
• Increase use of metals
• Increase use of glass
• California Refund Value
• California Refurbish Value
• California Re-use Value
• California Repurposing Value