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.

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

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

The colonisation of tropic pacific islands by humans have ' resulted in the extinction ' of more than _______________ species of native birds

Which species have become extinct in the last 200 to 300 years

Many species of animals have become extinct during the las.t hundred years.

Indicate whether the following statements are true or false. Correct each faqlse statement to make it true. (i) Mass extinction is the extermination of a large number of species due to catastrophers. (ii) IUCN Red list (2004) documents the extinction of 359 animal species. (iii) Quagga from Africa and Stellers sea cow from America have been extinct in last few years. (iv) Anthropogenic extinction is 10-100 times more faster than the rate of natural extinctions.

Indicate whether the following statements are true or false. Correct each faqlse statement to make it true. (i) Mass extinction is the extermination of a large number of species due to catastrophers. (ii) IUCN Red list (2004) documents the extinction of 359 animal species. (iii) Quagga from Africa and Stellers sea cow from America have been extinct in last few years. (iv) Anthropogenic extinction is 10-100 times more faster than the rate of natural extinctions.

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 .

Which of the following statements describe natural extinction ? (i) Extinctions abetted by human activities (ii) Slow replacement of existing species (iii) Also known as background extinction (iv) A small population is most likely to be extinct