Biodiversity and Conservation

"The Evil Quartet" of biodiversity loss includes which of the following?

Which of the following statements are correct? I. The Amazon rainforest being cut and cleared for cultivation of soyabeans is an example of habitat loss. II. Steller's sea cow and passenger pigeon became extinct due to over-exploitation by humans. III. The Nile perch introduced into Lake Victoria in East Africa helped in population growth of cichlid fish in the lake. IV. Water hyacinth is an invasive species. V. When a species becomes extinct, the plant and animal species associated with it are not affected. Choose the CORRECT answer from the options given below:

Exploring molecular, genetic and species-level diversity for products of economic importance is called:

Which of the following is an $in\ situ$ conservation method?

Since the origin and diversification of life on Earth, there have been five episodes of mass extinction of species. How is the sixth extinction, which is in progress, different from the previous episodes?