Choose the word that best completes each sentence.

Invertebrates may have an for protection and support.

Vertebrates have a backbone and an .

Which experiment would most likely contain experimental bias ?

Adoença vitiligo afeta qual doença do corpo?

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