Mod C Unit 3 Lesson 1 Biodiversity

At which labeled location would a rain forest most likely be found?

• 1

• 2

• 3

• 4

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Which of these explains why an ecosystem is healthy when it has a variety of species?

• An increased number of species allows for fewer food chains.

• A larger number of species reduces competition for abiotic resources

• A larger number of species allows for greater diversity in interdependence.

• An increased number of species contributes to greater chances for adaptability.

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Estuaries are called “the nurseries of the sea” because many species lay eggs and develop their young in estuaries. Which two features of estuaries support this role most?

• concentrated nutrients and a steep salt gradient

• abundant shelter and concentrated nutrients

• a steep salt gradient and shallow water

• shallow water and abundant shelter

What is the main reason for concern about the destruction of coral reefs related to global warming?

• The most colorful fish live in coral reefs.

• Coral reefs are ideal locations for studying marine life.

• Hundreds of thousands of species depend on coral reefs.

• Coral reefs can reduce shoreline damage from tsunamis.

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Why are seals able to live off the coast of Antarctica while frogs, snakes, and panthers are not?

• Seals can swim.

• Seals are predators.

• Seals have fur and blubber.

• Seals are warm-blooded animals.

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In some New Zealand estuaries, shellfish-bed populations have declined due to habitat modification and overharvesting. How will this affect the biodiversity of these ecosystems?

• Biodiversity will increase along with the number of shellfish people can harvest.

• Biodiversity will increase along with the value of the shellfish when people sell them.

• Biodiversity will decrease as well as the number of available shellfish.

• Biodiversity will decrease as well as the competition for harvesting shellfish.

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Which characteristic below describes a jaguar’s niche?

• hunts during the night.

• has a coat with dark spots.

• gives birth to up to four cubs.

• has a life span of 12 to 15 years.

In which way are rainforests and coral reefs different from ecosystems with few species?

• There are more prey than predators.

• The food web is more stable and lasting.

• Organisms often must compete for food.

• Plant populations are the primary producers.

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The temperate deciduous forest and temperate grassland biomes have the same maximum temperature. Which of the following is a reason they have different plant and animal species?

• they are at different altitudes

• they are at different latitudes

• the forest gets more precipitation

• the grassland gets more precipitation

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Which of these is a threat to the survival of an ecosystem?

• predator-prey population cycles

• less biomass at higher levels of the food web

• a shrinking variety of animal and plant species

• competition among some consumer populations

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