Much of the current tropical rainforest biomes are experiencing a rapid rate of decreasing forests cover, due to logging and conversion of forests into agricultural land. Scientists estimate, if this trend continues, that the loss of forested land would

Much of the current tropical rainforest biomes are experiencing a rapid rate of decreasing forests cover, due to logging and conversion of forests into agricultural land. Scientists estimate, if this trend continues, that the loss of forested land would

A)cause a decrease of soil erosion in those areas being deforested

B)increase the concentration of water vapor in the atmosphere due to increased transpiration

C)increase the total amount of carbon dioxide in the atmosphere

D)increase the amount of biodiversity in the area

E)decrease the available nitrogen, since decomposition rates are greatest in the tropics

Answer: C

Which of the following is a way that humans alter the water cycle?

Which of the following is a way that humans alter the water cycle?

A)withdraw large quantities from streams, lakes and aquifers

B)alter weather patterns by clearing vegetation

C)all of these choices

D)increase flooding by disturbing natural flood controls

E)increase runoff by clearing vegetation from the land

Answer: C

Also known as mineralization, this process is carried out by decomposers and returns nutrients in organic matter back to the soil

Also known as mineralization, this process is carried out by decomposers and returns nutrients in organic matter back to the soil

A. Nitrification

B. Denitrification

C. Nitrogen fixation

D. Assimilation

E. Ammonification





Answer: E

Small inputs of this substance, commonly a limiting factor in aquatic ecosystems, can result in algal blooms and dead zones.

Small inputs of this substance, commonly a limiting factor in aquatic ecosystems, can result in algal blooms and dead zones.

A. dissolved oxygen

B. dissolved carbon dioxide

C. sulfur

D. phosphorous

E. potassium

Answer: D

Which micronutrient is required by humans in the largest amounts?

Which micronutrient is required by humans in the largest amounts?

A. magnesium

B. nitrogen

C. potassium

D. sulfur

E. calcium

Answer: B

Which of the following would NOT be an abiotic limiting factor?

Which of the following would NOT be an abiotic limiting factor?

A)too much water

B)population overcrowding

C)too little potassium

D)too little water

E)too high temperature

Answer: B