Answer the following problems.

problem 1) 1 In what ways can human activity lead to the extinction of a species in an area?

problem 2) How could humans be disadvantaged by the extinction of a plant species?

problem 3) In what ways can we try to protect a species from extinction?

problem 4) What do the initials CITES, WWF and IWC stand for?

problem 5) Apart from conserving individual plants and animals, what else needs to be conserved.

problem 6) What term is used to describe the range of organisms in a habitat?

problem 7) In what ways can modern agriculture threaten the survival of species?

problem 8) Name three sources of energy which do not depend on fossil fuel.

problem 9) Which of the following can be (a) recycled, (b) obtained from renewable sources?

coal, paper, lead, wood, glass, vegetable oil, iron, polythene, methane

problem 10) Name three sources of biofuel (fuel derived from biological sources).