Which of the following is not a reason that accounts for greater biodiversity of tropics?

1. availability of more solar energy
2. more niche specialization
3. more time for species diversification
4. large seasonal variations in environmental factors

The greatest biodiversity on the earth is found in
1. African grasslands
2. Amazonian rain forest in South America
3. Western Ghats in India
4. Nile delta in Egypt

The main difference between "Sixth Extinction" and the previous five extinctions is that the sixth extinction:
1. is mainly occurring on islands
2. is mainly affecting plants
3. is occurring at a faster rate
4. does not involve human activities

Which of the following does not contribute to the species diversity of the tropics?

1. Predictability

2. Predation

3. High productivity

4. Spatial homogeneity

The relation between species richness and area for a wide variety of taxa on a logarithmic scale is a:

1. rectangular hyperbola

2. straight line

3. sigmoid curve

4. sine curve

The hot spots of biodiversity conservation are characterized by:
1. High endemicity and high threat of extinction
2. Low endemicity and high threat of extinction
3. High endemicity and low threat of extinction
4. Low endemicity and low threat of extinction

Which of the following has maximum global biodiversity?
1. Angiosperms
2. Algae
3. Lichens
4. Mosses

What is applicable to both Lates niloticus and Lantana camara ?

1. They are on the verge of extinction due to over-exploitation by humans.

2. They are alien species that became invasive in certain environments causing threat to indigenous biodiversity.

3. They are mutualists and likely to undergo co-extinction in recent future.

4. They are keystone species and are vital to the stability of tropical ecosystems.

Givenbelow is the representation of the extent of global diversity of invertebrates. What groups the four portions (A-D) represent respectively ? 

        A                            B                             C                               D

(1) insects               Crustaceans               Other animal                 Molluscs

(2) Insects           Other animal groups       Crustaceans                  Molluscs                

(3) Molluscs         Other animal groups       Crustaceans                    Insects

(4) Insects                 Molluscs                  Crustaceans              Other animal groups

The term "The Evil Quartet" is related with:

(1) Four major causes of forest loss   

(2) Four major causes of population explosion

(3) Four major causes of air pollution 

(4) Four major causes of biodiversity losses