Colonisation!

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.

Species that are most effective at colonising new habitats show

Genetic drift occurs when a few individuals of a species colonise an island. This particular phenomenon is known as

Many population colonising a new habitat show a logistic population growth pattern over time, as shown in the figure below. In such a population, the POPULATION growth rate

The first organisms to colonise rocks are

Ancestor finches that colonised the Galapagos islands were from

Select first group of organisms to colonise rocks and hence, are of great ecological importance.