Which is strong evidence that similar traits in different evolutionary lineages are the result of homology and not homoplasy

Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1

All organisms contribute some water to the water cycle by conducting

2. which is the last step in the scientific method?