hi i have 30 quiz on natural science online

What is the type of agriculture most likely to be found in developing countries?

1. It is possible to use natural parasites to control pest species.

   
   True
   
   False
   

   
   
   
   One concern about the use of pesticides is that ____.

   	a.	residues can be associated with the development of cancer
   	b.	their use is not regulated
   	c.	they are more expensive than other approaches in both the short and long term
   	d.	they are not available in sufficient quantities to meet the demand for their use
   	e.	their effects are relatively slow compared with other approaches

   
   
2. The majority of cases of malaria (90%) occur ____.

   	a.	in sub-Saharan Africa
   	b.	on Pacific islands
   	c.	in Asia
   	d.	in North America
   	e.	in South America

   QUESTION 34

   1. Living organisms can be classified into ____________________, or feeding levels, based on their source of nutrients.

      
      

   1 points

   QUESTION 35

   1. Photosynthesis is performed by ____.

      	a.	decomposers
      	b.	heterotrophs
      	c.	autotrophs
      	d.	herbivores
      	e.	detritivores

   1 points

   QUESTION 36

   1. The law of conservation of matter states that whenever matter undergoes a physical or chemical change, ____.

      	a.	atoms cannot be created or destroyed
      	b.	atoms can be created
      	c.	atoms can be destroyed if we compost them
      	d.	atoms can be destroyed
      	e.	atoms can be created by reactions between organic compounds

   1 points

   QUESTION 37

   1. Aerobic respiration is the process by which cells use oxygen to produce energy that they can use to fuel life processes.

      
      True
      
      False
      

      
      

      QUESTION 46

      1. The chemicals PCBs, arsenic, and lead are all examples of ____________________.

         
         

      1 points

      QUESTION 47

      1. A deadly, multidrug resistant form of ____ has been spreading and is difficult to treat. Because of the high risk of this illness, those affected must be quarantined and treated with care by healthcare workers.

         	a.	tuberculosis
         	b.	malaria
         	c.	HIV
         	d.	influenza
         	e.	avian bird flu

         QUESTION 48

         1. A global-scale outbreak of an infectious disease such as tuberculosis or AIDS is called a(n) ______________________________.

            
            

         1 points

         QUESTION 49

         1. A(n) ____________________ effect is an immediate or rapid reaction to exposure to a harmful substance.

            
            

         1 points

         QUESTION 50

         1. Explain why empowerment of women tends to slow population growth.

            
            

         1 points

         QUESTION 51

         1. China’s one-child policy ____.

            	a.	has had no effect on population growth
            	b.	has been copied by many other countries around the world
            	c.	has not yet been enacted
            	d.	has been praised for improving human rights
            	e.	was created amidst the threat of mass starvation due to rapid population growth

         1 points

         QUESTION 52

         1. The term demographic transition refers to ____.

            	a.	a stabilization of crude birth rates
            	b.	a requirement for a population to reach a specific size before it becomes stable
            	c.	the slowing down in the growth of a population as it approaches the carrying capacity
            	d.	the decline in death rates followed by a decline in birth rates that occurred when the germ theory of disease was discovered
            	e.	the decline in death rates followed by decline in birth rates when a country becomes industrialized

         1 points

         QUESTION 53

         1. Human populations grow or decline in particular countries, cities, or other areas through the interplay of three factors: births, ____________________, and migration.

            
            

         1 points

         QUESTION 54

         1. Family planning is often ____.

            	a.	cost-effective as it saves more money than it costs
            	b.	relatively cost-ineffective as it costs little more than it saves
            	c.	expensive in some countries, even though it is inexpensive in others
            	d.	cost-free
            	e.	prohibitively expensive

            QUESTION 57

            1. Rainshadows occur on the windward side of mountain ranges.

               
               True
               
               False
               

            
            

            QUESTION 61

            1. Once nitrogen is formed into complex organic molecules, it may be recycled back to atmospheric nitrogen by:

               		The sedimentary cycle
               		Primary succession
               		Secondary succession
               		Denytrifying bacteria
               		Retrogression

            1 points

            QUESTION 62

            1. What is the root cause of food insecurity?

               	a.	Climate change
               	b.	Political disputes
               	c.	Poverty
               	d.	Poor organization
               	e.	Insufficient food resources

            1 points

            QUESTION 63

            1. A disadvantage to the green revolution is that plant yields are generally similar to those with other methods of agriculture unless substantial amounts of commercial inorganic fertilizers are applied.

               
               True
               
               False
               

            1 points

            QUESTION 64

            1. Following a disturbance such as a forest fire, secondary ecological succession can occur.

               
               True
               
               False
               

            1 points

            QUESTION 65

            1. Monoculture is a method of growing food that is characteristic of ____.

               	a.	polyculture
               	b.	traditional subsistence agriculture
               	c.	industrialized agriculture
               	d.	both industrialized agriculture and traditional intensive agriculture
               	e.	traditional intensive agriculture

               1 Describe the process of recycling nutrients (4 PTS)

               2 Discuss some of the factors that govern toxicity? (4 PTS)
               

               
               
               3 List four factors that are responsible for emerging infectious disease? (4 PTS)
               
               
               
               
               
               4