Maintenance of a stable body temperature can be achieved through which systems?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

An experimental procedure requires a 10 ml of acid to be dissolved