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A) are large molecules necessary for making macromolecules B) are what large predators eat

Question : A) are large molecules necessary for making macromolecules B) are what large predators eat : 2141754

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

22) Macronutrients ________.

A) are large molecules necessary for making macromolecules

B) are what large predators eat

C) are required in large amounts for organisms to survive

D) are the only nutrients that can be tracked in nutrient cycles

E) can only be taken up by plants from rock cycles

23) Experiments done in Canadian lakes and in coastal regions of the Baltic Sea and Long Island Sound have demonstrated that ________.

A) various macronutrients appear to limit growth throughout the world

B) only one micronutrient, phosphorus (phosphates), limits growth throughout the world

C) the same few micronutrients limit growth throughout the world

D) the only micronutrient that is important is carbon

E) only one micronutrient, nitrogen (nitrates), limits growth throughout the world

24) The largest pool of carbon in the carbon cycle is ________.

A) the hydrosphere

B) the atmosphere

C) the ocean

D) sedimentary rock

E) in plants and animals

25) The phosphorus in all biological tissues can traced back to ________.

A) phosphorus dissolved in the ocean and taken up by shellfish

B) volcanic activities

C) phosphorus weathered from rock

D) atmospheric phosphorus gas

E) phosphorus in animal bones

26) Negative feedback processes tend to function within ecosystems to ________.

A) cause ecological relationships to disintegrate

B) cause ecological relationships to flourish

C) cause further ecological destruction

D) reinforce harmful changes

E) stabilize the ecosystem

27) Nitrogen fixation is a process that makes nitrogen available to plants and is carried out by ________.

A) nitrogen gas dissolving in fresh water and in the ocean

B) parasitic bacteria

C) plants during photosynthesis

D) volcanic eruptions

E) mutualistic and free?living bacteria

28) Humans have dramatically altered the rate of nitrogen fixation into forms usable by autotrophs ________.

A) due to the burning of fossil fuels to meet our energy needs

B) by producing synthetic fertilizers and applying them to crops, lawns, and parks

C) by selectively removing leguminous plants

D) by using antibiotics to reduce the numbers of denitrifying bacteria

E) because of the erosion of farmlands through poor agricultural practices

29) Aquifers are ________.

A) recharge lakes at water quality facilities

B) the result of transpiration

C) underground water reservoirs

D) oceans

E) natural ponds and lakes

30) By damming rivers, we are ________.

A) increasing evaporation

B) decreasing evaporation

C) increasing transportation

D) increasing transpiration while decreasing evaporation

E) decreasing transpiration

32) Ecological modeling ________.

A) is used by evolutionary biologist to predict future evolutionary events

B) has been rejected because it requires the dismantling and dissecting of a functioning ecosystem

C) has so far proven useless in predicting ecological events

D) is a form of ecosystem restoration

E) involves constructing and testing simplified representations of ecological systems

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