Interestingly, echinoderms (sea stars and sea urchins) have three germ layers yet they display radial symmetry as adults rather than bilateral symmetry. it has been suggested that their immediate ancestors must have been bilaterally symmetrical and evolved radial symmetry. how can this be explained?

What two fields of study provide the core information that is used to classify organisms?

Plz ! a scientist wants to produce a cow that makes a particular human protein in it’s milk the desired protein causes blood to clot and can be used to treat hemophilia (a blood clotting disorder). which of the following would be best for the scientist to use? a. genetic crosses. b. cloning. c. selective breeding. d. genetic engineering.

If a keystone species is removed from an ecosystem