Presentation on theme: "The top 10 Vestigial Structures. 10 The Wings on Flightless Birds The Cassowary, the sexier, but less-well- known flightless bird. Kiwi bird in Australia."— Presentation transcript:
The top 10 Vestigial Structures
The Wings on Flightless Birds The Cassowary, the sexier, but less-well- known flightless bird. Kiwi bird in Australia.
Hind Leg Bones in Whales Whale skeleton showing pelvis and thigh bones. Snake hind limbs.
Erector Pili and Body Hair When a rabbit is scared, its hair stands on end. When a human is scared, he or she calls the police.
The Human Tailbone (Coccyx) The human tailbone doesn't do much, but really hurts if you land on it.
The Blind Fish Astyanax Mexicanus and Blind Mole rat Astyanax Mexicanus: growing up in the wrong neighborhood.
Wisdom Teeth in Humans They need regular brushing but did they come from Apes?
The Sexual Organs of Dandelions Send in the clones...
Fake reproduction in Virgin Whiptail Lizards (Vestigial Behavior) Feminist lizards take the male out of the picture.
Male Breast Tissue and Nipples They are not fully functional and, because cancer can grow in male or female breast tissue, the tissue can be dangerous.
The Human Appendix In 2000, in fact, there were nearly 300,000 appendectomies performed in the United States, and 371 deaths from appendicitis.
Analysis 1.Define vestigial. 2.How could vestigial structures be proofs for evolution? 3.Choose 2 of the structures mentioned and give an explanation for why they exist.
Answers 1.Vestigial: remnant of structure that is seemingly useless 2.Ancestors may have used that structure. Ex. Appendix was used to help digest high fiber foliage, but now we rarely eat roughage.