Which feature is shown only by higher invertebrates, as compared to lower invertebrates?
bilateral symmetry
true coelom
three germ layers

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical?

Name the following: (a) category of pathogen that causes diseases, like common cold and mumps. (b) the microorganism that requires a host to produce.

Do you think the gene eef1 alpha1 supports cell theory? explain your response.