Question

1. QUESTION 11

   Discuss the benefits of tropical rainforests.

   QUESTION 12

   A tundra is a boreal forest in the N. hemisphere forming acontinuous belt of coniferous trees across N. America throughEurasia.

   True

   False

   QUESTION 13

   The most significant threat to biodiversity today is________________.

   		the killing of competing species
   		the elimination of habitat
   		the introduction of foreign species.
   		the reduction of sperm counts.
   		the acidification of the oceans.

   QUESTION 14

   Macronutrients include carbon, phosphorous, oxygen, sulfur,hydrogen, nitrogen and zinc.

   True

   False

   QUESTION 15

   The Law of Conservation of Matter means that everything isaccounted for but there is no mass balance.

   True

   False

   QUESTION 16

   What is the term that refers to the range of animal and plantspecies and the genetic variability among those species?

   		Biome
   		Ecosystem
   		Biodiversity
   		Community

   QUESTION 17

   Describe traditional methods for enriching or recoveringsoils.

   
   QUESTION 18

   Explain the various techniques involved in gene transfer amongplants.

   QUESTION 19

   Which of the following is true about phosphates?

   		They occur as a gas.
   		Phosphate rocks are a renewable resource.
   		The sedimentary cycle prevents the leaching of phosphorus fromrocks.
   		Plants are unable to take up released phosphates in rootsbecause of some unknown mechanism.
   		Phosphorous is the main element in compounds such as adenosinetriphosphate (ATP).

   QUESTION 20

   A mammal population that is low in diversity and includes bisonmay be found in the:

   		Tropical savannahs
   		Temperate grasslands
   		Temperate forest
   		Desert
   		Taiga