Biomes/Biodiversity/Succession/Food Webs Review

In what way is a decomposing log in a forest a microhabitat?

• It supports a distinct population of organisms, but the forest houses the log itself.

• It provides camouflage for particular organisms to protect them from predators.

• It decomposes into organic matter that enriches the soil.

• It is a large community of organisms that occupy a major habitat.

Two microhabitats exist: one in a decomposing log and another in an area of grass by a driveway. What is the best explanation for the different variety of organisms in the two microhabitats?

• The rotting log and grassy area are in different biomes.

• Conditions for survival are different in each location.

• The rotting log has predators while the grassy area does not.

• There is more space in the rotting log than in the grassy area.

A cactus and a a tulip are two plants that grow in different parts of the country. Which of the following characteristics of the plant's environments has the greatest effect on the types of plants that grow in them?

• Temperature

• Amount of rainfall

• Amount of light

• Space

Which statement best describes the comparison of lake and ocean environments?

• The lake and ocean environments support the same organisms because they are both water and are made up of the same elements.

• The lake and ocean environments support different organisms because most freshwater organisms cannot live in saltwater.

• The lake and ocean environments support the same organisms, but they will look different because of the type of water.

• The lake and ocean environments support different organisms because ocean organisms are blocked by land from getting into lakes.

If your local environment begins to turn into a desert, what will most likely happen to the organisms in the environment?

• The populations of organisms currently existing in the environment will increase.

• The populations of organisms currently existing in the environment will not be affected.

• The new desert environment will be unable to support any populations of organisms.

• A different variety of organisms will be supported rather than the ones that currently exist.

A good adaptation for living in a grassland would be —

• the ability to hibernate.

• the ability of plants to grow very high to reach the sunlight.

• thick, insulating fur.

• the ability of plants to regrow after prairie fires.

Some desert animals are most active at dusk and dawn. This adaptation is MOST helpful for —

• preying on plant species.

• finding new water sources.

• avoiding high temperatures.

• hiding from hungry animals.

If you were making an ecosystem in an aquarium, what would you need for it to be most sustainable.

• Multiple species of animals and plants

• multiple species of plants

• one species of animals

• multiple species of animals

A farmer digs a small pond in a pasture. The farmer adds young individuals from two species of algae-eating fish to the pond and plants some reeds around the edges of the pond. The farmer wants the pond to be a sustainable ecosystem. Which of the following would be most helpful in increasing the pond ecosystem's sustainability?

• Decreasing the number of plant species around the edges of the pond

• Introducing older fish of the same species into the population of algae-eating fish

• Having a greater diversity of living organisms in the pond

• Adding gravel between the water and where the reeds are planted

The Brazilian rain forest is an area with significant biodiversity. As the rain forest is replaced with agricultural land, it is reasonable to predict a reduction in —

• consumption of solar energy.

• sustainability over time.

• precipitation levels.

• average daily temperature.