Which would have more humus a desert or a forest

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

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what

Does anyone know what the schooling version of sos mean? example