<span>Punnett square
Hope that helps you</span>
Answer:
skeletal system is for bones and the circulatory system is for fluids
A homologous structure is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor. In other words, it’s when very different animals have bones that appear very similar in form or function and seem to be related<span>
</span><span>Hope this helps!</span>.