Ancient fossils of horses ancestors have five toes at the end of each leg. as we look at more recent fossils the five toes become three, then two, until the modern day horse, which only has one toe. this demonstrates which characteristic of living organisms?

Why can cancer in the lymph nodes (lymphoma) be particularly dangerous? a. the lymph node's ability to produce cancer-fighting lymphocytes would be compromised. b. the lymph node's ability to produce cancer-fighting lymph would be compromised. c. the lymph nodes produce lymph, which nourishes growing cancer cells. d. the lymph nodes produce chyle, which nourishes growing cancer cells.