(a) What are thermoplastics ? Give two examples of thermoplastics.
(b) What are thermosetting plastics? Give two examples of thermosetting plastics.
a ) Name two examples of each biodegradable and nonbiodegradable pollutants
B ) what are the two things moving through an ecosystem
C) what is ecosystem
D) define food web
E ) why are Bacteria and fungi called decomposers
(a) What are viviparous animals? Give two examples of viviparous animals.
(b) what are oviparous animals? Give two examples of oviparous animals.