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Human Influences on the Environment 3
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The table below shows the number of endangered species in the world (figures from 1987). Study the information in the table and answer the questions which follow:

 

Group

Number of Endangered Species

Mammals

274

Birds

274

Reptiles

074

Amphibians

013

Fishes

048

Snails

003

Clams

025

Crustaceans

001

Insects

007

Plants

051

 

(a) What does the term "endangered species" mean?

 

 

 

 

(b) What can cause a species to become endangered?

 

 

 

 

(c) Choose (i) a species of mammal and (ii) a species of bird which are endangered species and explain why they are endangered.

(i) species choice =

 

explanation

 

 

 

(ii) species choice =

 

explanation

 

 

 

(d) The figures in the table date back to 1987. Use the Internet to research the current numbers of endangered species.

 

Group

1987

2017

Mammals

274

 

Birds

274

 

Reptiles

074

 

Amphibians

013

 

Fishes

048

 

Snails

03

 

Clams

025

 

Crustaceans

001

 

Insects

007

 

Plants

051

 

 

(e) What can man do to help endangered species?