So im trying to do a backround research paper and i have no idea where to start- free points too ig :P

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.

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.