This is a huge area of discussion, therefore, you must be very selective of your topic, and write succinctly and to the point. For example, you may want to choose the theme of "reproductive strategies" of fishes, amphibians, reptiles, birds, and mammals, or you may choose "locomotion", "environmental adaptations", etc etc etc - the list is endless. I am interested in reading your specific interest in evolutionary biology. Throughout the millions of years of evolutionary …showed first 75 words of 2073 total…

…showed last 75 words of 2073 total…mammals, we were ready to start walking, caring for our young with free hands and became all around more capable of moving, feeding, communicating, and surviving to the present. Without all of these drastic changes, the only animals around would still be sucking food from the bottom of the ocean and that would only be true if their watery environment stayed the same! Cecie Starr, Basic Concepts in Biology (United States: Brooks/Cole Thomson Learning, 2002)