Besides reducing biodiversity what are the characteristics of an ecosystem that might change if the conditions of the ecosystem change? Size Genetic Variation Density Distribution

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid