Which of the following are correct 1. Alpha diversity (within-community diversity) refers to the rate of replacement of species along a gradient of habitats or communities. 2. Gamma diversity (overall) refers to the diversity of the habitats over the total landscape or geographical area. Select the correct answer using the codes given below. Codes:

• A. Only 1
• B. Only 2
• C. Both 1 & 2
• D. neither 1 nor 2