Tiktaalik is a fish that lived 375 million years ago that grew to three metres long and had aquatic features mixed with others more suited to life on land. The fossils of five Tiktaalik specimens reveal that the animals had a large, robust pelvic girdle, a prominent hip joint, and long hind fins. The powerful fins could have propelled the beast in the water, but also helped it walk on riverbeds, or scramble around on mudflats. It is believed that Tiktaalik evolved into four- legged land animals. The scientists have yet to find a Tiktaalik hind fin bone, or any remains that might shed light on the origins of toes. A picture of Tiktaalik is available at https://www.npr.org/2010/07/05/127937070/t human-edge-finding-our-inner-fish Describe how Darwin would explain that evolution of hind legs (of land animals) actually began as enhanced hind fins (of Tiktaalik), referring to his relevant observations and inferences (Lecture 02 History of Evolutionary Thought - slide 18). Indicate where the observations and inferences are illustrated in your answer.
Tiktaalik is a fish that lived 375 million years ago that grew to three metres long and had aquatic features mixed with others more suited to life on land. The fossils of five Tiktaalik specimens reveal that the animals had a large, robust pelvic girdle, a prominent hip joint, and long hind fins. The powerful fins could have propelled the beast in the water, but also helped it walk on riverbeds, or scramble around on mudflats. It is believed that Tiktaalik evolved into four- legged land animals. The scientists have yet to find a Tiktaalik hind fin bone, or any remains that might shed light on the origins of toes. A picture of Tiktaalik is available at https://www.npr.org/2010/07/05/127937070/t human-edge-finding-our-inner-fish Describe how Darwin would explain that evolution of hind legs (of land animals) actually began as enhanced hind fins (of Tiktaalik), referring to his relevant observations and inferences (Lecture 02 History of Evolutionary Thought - slide 18). Indicate where the observations and inferences are illustrated in your answer.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:Tiktaalik is a fish that lived 375 million years
ago that grew to three metres long and had
aquatic features mixed with others more
suited to life on land. The fossils of five
Tiktaalik specimens reveal that the animals
had a large, robust pelvic girdle, a prominent
hip joint, and long hind fins. The powerful
fins could have propelled the beast in the
water, but also helped it walk on riverbeds,
or scramble around on mudflats. It is
believed that Tiktaalik evolved into four-
legged land animals. The scientists have yet
to find a Tiktaalik hind fin bone, or any
remains that might shed light on the origins
of toes. A picture of Tiktaalik is available at
https://www.npr.org/2010/07/05/127937070/t
human-edge-finding-our-inner-fish
Describe how Darwin would explain that
evolution of hind legs (of land animals)
actually began as enhanced hind fins (of
Tiktaalik), referring to his relevant
observations and inferences (Lecture 02
History of Evolutionary Thought - slide
18). Indicate where the observations and
inferences are illustrated in your answer.
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