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1. 
Food chains allow:
A.
Evidence the relationships of ecosystems.
B.
Evidence the loss of ecosystems.
C.
Know which are the most important animals.
D.
Analyze the environment.
2. 
In a food chain, consumers can be classified into:
A.
Mammals, oviparous, viviparous
B.
Herbivores, carnivores, omnivores
C.
Vertebrates and invertebrates
D.
None of the above
3. 
The fundamental basis for food chains is:
A.
Primary consumers
B.
Secondary consumers.
C.
The producers.
D.
The decomposers.
4. 
Which of the following organisms is a producer?
A.
The worm.
B.
Plant with flower.
C.
Butterfly.
D.
A mammal.
5. 
In the food chain there are some animals that eat meat they are called:
A.
Herbivores.
B.
Omnivores
C.
Scavengers
D.
Carnivores