In India, we find mangoes with different flavours, colours, fibre content, sugar content, and even shelf life. The large variation is on account of:

1.	Genetic diversity	2.	Species diversity
3.	Hybridisation	4.	Induced mutations

The Earth Summit was held in Rio do Janeiro in:

When a threatened plant needs urgent measures to save it from extinction, the desirable approach is:

Biodiversity should be conserved as it plays a major role in many ecosystem services that nature provides. Such an argument is called:

The search for previously unknown compounds in organisms that have never been used in traditional medicine is known as:

What percentage of total oxygen in the earth’s atmosphere is produced by Amazon rainforest through photosynthesis?

The most important cause of the loss of biodiversity today is the:
1. Habitat loss and fragmentation
2. Overexploitation
3. Alien species invasion
4. Co-extinctions

Extinction of Stellar’s sea cow and passenger pigeon was due to:

What exotic introduction is threatening indigenous catfishes in our rivers?

Introduction of Lates niloticus led to the extinction of: