LS10 And LS11 (ecosystems) Question Preview (ID: 42678)


Dynamics In The Ecosystem And Human Interaction. TEACHERS: click here for quick copy question ID numbers.

Beavers do not migrate and can adapt to changing climates. Which of the following would threaten the survival of beavers?
a) snow in January
b) hot temperatures in July
c) freezing rain in December
d) forest fire in October

_____ prevent populations from increasing in size.
a) limiting factors
b) biotic factors
c) cellular respiration
d) population densities

Which would NOT influence population size?
a) hibernation
b) migration
c) introducing a new species to an ecosystem
d) droughts and floods

When plants grow or bend towards sunlight
a) hibernation
b) phototropism
c) drought
d) dormancy

In order for an animal to survive while in hibernation, its body’s metabolic rate _____.
a) decreases
b) doubles
c) stays the same
d) increases

When plants stop metabolism and growth for a period of time
a) hibernation
b) phototropism
c) drought
d) dormancy

The preservation and careful management of the environment and natural resources
a) conservation
b) pesticides
c) greenhouse gases
d) poaching

Pollution threatens the success of organisms by increasing the _____.
a) diversity in an area
b) number of species
c) availability of fresh water only
d) competition for limiting factors such as food and shelter

Deforestation results in an increase of greenhouse gases because less trees means less _____.
a) glucose is released into the atmosphere
b) carbon dioxide is released into the atmosphere
c) oxygen is removed from the atmosphere
d) carbon dioxide is removed from the atmosphere

Which of the following is the greatest threat to biological diversity today?
a) methane poisoning
b) deforestation
c) use of plant fertilizers
d) diversity of animals

When topsoil is carried away, plant growth suffers for wildlife and farming. What carries away topsoil?
a) pollution
b) fertilizer
c) erosion
d) poaching

Which of the following is NOT a negative impact from clearing away plants from a large plot of land?
a) There will be a decrease in natural resources for  animals to utilize.
b) Birds find seeds and insects on cleared and  plowed land
c) Fertilizers containing nitrogen run-off to the  surrounding ecosystems
d) Fewer trees for animal habitats

A pond that suddenly has an increased growth in algae probably was polluted by
a) people over-fertilizing their lawns nearby
b) people dumping waste oil in the pond
c) an increase in chromosomes
d) a diseased animal

Gases that trap heat in the Earth's atmosphere
a) Oxygen
b) Greenhouse gases
c) Smoke
d) Nitrogen

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