The type of cells that secrete directly into the blood stream are cells. a. exocrine gland b. squamous epithelial c. columnar epithelial d. endocrine gland

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.

Anybody who knows ap biology, can you friend or message me

According to the cladogram, which organisms have roundworms as a common ancestor?