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Colonisation of tropical pacific Islands...

Colonisation of tropical pacific Islands by humans have resulted in extinction of more than……….. Species of native birds.

A

1000

B

7000

C

784

D

15000

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The correct Answer is:
A
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Fill in the blanks with suitable words : (i) Loss of species which occurred in the geological pasr at a…….. Rate, is called natural extinction. (ii) Colonisation of tropical Pacific Islands by humans have resulted in extinction of………. Species of native birds. (iii) Dodo from......and........from Australia have become extinct in last 500 years. (iv) Anthropogenic extinction is causing a.........mass extinction of species.

Which of the following statement/is /are wrong? I. Communities with more species, generally, tend to de more stable than those with less species. II. A stable community should show too much variation in productivity from year to year. III. The colonisation of tropical pacific Islands by humans is said to have led to the extinction of more than 2,000 species of native birds. IV. The accelerated rates of species extinctions that the world is facing now have nothing to do with human activities. V. The biological wealth of our planet has been declining rapidly and the accusing finger is clearly pointing to human activities .

The colonisation of tropical Pacific Islands by humans is said to have led to the extinction of more than

Read the below statements and select the appropriate option. a. Experimental removal of Pisaster resulted in the extinction of more than species of invertebrates. b. Nearly 20 percent of all insects are known to be phytophagous. c Predators help to maintain species diversity.

Fear of extinction of species from tropical forests is

Give three main causes of extinction of a species by human intervention.

The main cause of extinction of species from tropical area is :

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