Jose cultivates a variety of plants for the fabric industry and is interested in genetically engine

Jose cultivates a variety of plants for the fabric industry and is interested in genetically engineering fiber cell types. What cells type would he focus upon?

 

   A. Parenchyma cells.   
 

   B. Sieve tubes.   
 

   C. Companion cells.   
 

   D. Sclerenchyma cells.   
 
Marcy is a meteorologist concerned that rainfall may decline in a country undergoing extensive deforestation. Why might rainfall decline?

 

   A. Excessive nitrogen fixation.   
 

   B. Depletion of aquifers.   
 

   C. Pollution of groundwater.   
 

   D. Lack of nitrogen fixation.   
 

   E. Reduced transpiration.   

Axel is a fishery biologist inspecting a bay in which insects feed upon algae, fish feed upon insects, and crabs consume the remains of fish that die. In this example, how would you classify a crab?

 

   A. Producer.   
 

   B. Primary Consumer.   
 

   C. Autotroph.   
 

   D. Secondary consumer.   
 

   E. Detritovore.