I believe animals that possess homologous structures probably evolved from the same ancestor. Homologous structures are similar because of common ancestry. 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.
Answer:
because they can donate blood to anyone
Explanation:
Clues such as fossils such as bones, footprints, tar, etc, preserved underground helped inform scientists. You can also count how old a tree is when you cut it open and there are some alive for thousands of years so that is a possible way.
Plants tend to grow where the light is coming from because the sun is there main energy source. this helps with plants growing in nature because in nature they will have all the sun that they need and will be able to grow faster
