Why are scientists concerned about the loss of species as a result of human activities? why would the extinction of other species negatively affect human society?

What is the mrna strand that would be copied from this dna strand

What statements describe a host organism?

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