a-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/the-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 (History of Evolutionary Thought). Indicate where the observations and inferences are illustrated in your answer. b- we examined the evolution of frog species. After the construction of a highway, at year 5000 (Species Concepts and Speciation), the population at the right side of the highway and the population at the left side of the highway evolved into two new species. What mode of speciation--allopatric or sympatric--led to these two frog species? Provide your reasoning making reference to the information that you know about these organisms.
a-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/the-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 (History of Evolutionary Thought). Indicate where the observations and inferences are illustrated in your answer. b- we examined the evolution of frog species. After the construction of a highway, at year 5000 (Species Concepts and Speciation), the population at the right side of the highway and the population at the left side of the highway evolved into two new species. What mode of speciation--allopatric or sympatric--led to these two frog species? Provide your reasoning making reference to the information that you know about these organisms.
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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Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.
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Transcribed Image Text:a- 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/the-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 (History of Evolutionary Thought).
Indicate where the observations and inferences are illustrated in your answer.
b- we examined the evolution of frog species. After the construction of a highway,
at year 5000 (Species Concepts and Speciation), the population at the right side of
the highway and the population at the left side of the highway evolved into two new
species. What mode of speciation--allopatric or sympatric--led to these two
frog species? Provide your reasoning making reference to the information that
you know about these organisms.
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