Due to human activities the world is facing an accelerated rates of species

extinctions now a days. Mention the four main causes of biodiversity losses or ‘ The Evil Quartet ’

In species area relationship graph ecologists have discovered that the value of Z lies in the range of 0.1 to 0.2, regardless of the taxonomic group or the region. Find out the value of Z if the slope of the line to be much steeper .

Observe the graph given below and answer the following questions;

 a) Identify S, A, C and Z in the graph

b) Name the scientist who explained species area relationship.

Humans derive countless direct economic benefits from nature. Do you agree with it? Justify.

Mention the three different levels of biodiversity. Explain.

The reasons for conserving biodiversity can be grouped into three categories. Identify them.

The National parks and Zoological parks are two types of biodiversity conservations.

a) Identify the type of biodiversity conservations they belong.

b)Differentiate them.

c) Give two another examples for these two types of conservations.

The introduction of Nile perch into Lake Victoria lead to the extinction of Cichlid fish in the lake. Give reason for this biodiversity loss with the help of another example.

When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct.

a) Identify the cause of extinction of this species.

b) Explain it with an example.