How many electrons an oxygen can donate and receive?

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.

50 pts plz what is the physical state of matter of baking soda.

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery