What is the tool to meausre wind direction?

What is the ecological role of food chains and food webs

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

Gram-negative bacteria have a cell wall that is! and does not accept the stain, making itappear