Q. Which of the following pairs regarding classification of biodiversity are incorrect?

1. Alpha diversity - Between-community diversity
2. Beta diversity - Within-community diversity
3. Gamma diversity - Overall biodiversity

Select the correct option from the codes given below:
Answer: 1 & 2
Notes: Alpha diversity means within-community/habitat diversity. Beta diversity refers to diversity between communities, indicating species turnover along environmental gradients. Gamma diversity reflects overall biodiversity at the landscape or geographic scale. Thus, pairs 1 and 2 are incorrect, while pair 3 is correct.