Which quality do all good scientific designs share? A)They have only one tested group.
B)They cannot be repeated by other scientists.
C)They have easily understandable language.
D)They ensure valid results.

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? the wings are analogous structures that evolved differently and do not have a similar internal structure. the wings are homologous structures that evolved differently and do not have a similar internal structure. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. wings of bats are vestigial structures, but the wing structures of birds are not vestigial.

Explain why ecosystem diversity results in species diversity in a healthy biosphere

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?