Your six friends are now exploring Ellsmere Island in Canada. On this Island, in 2005, scientists discovered the fossil of Tiktaalik roseae, a famous “transition fossil” between swimming fish and four legged vertebrates (the tetrapods). Your friends begin to discuss Tiktaalik’s (pronounced tik-TAA-lik) origin. This is what they said:
Courtney: “Obviously, there was not enough food in the sea, so a mutation occurred and that caused Tiktaalik to be able to go on the land.”
Jose: “Courtney, I agree with you. Tiktaalik must have needed to develop fins that were capable of supporting movement on land.”
Raquan: “You two might be onto something. Clearly, Tiktaalik encountered a changing environment and it adapted to it.”
Mike: “Yeah, Raquan, once it acquired the trait of fins capable of supporting movement on land, as Jose suggested, it passed them onto its offspring.”
Keisha: “Alright, so then do we think this is an example of evolution? If so, then this form must have evolved into the tetrapods we see today over a very long time.”
Alex: “Keisha, I agree with you that this process of change took a long time, but I’m not so sure if Tiktaalik evolved into the tetrapods we see today. If Tiktaalik is a fossil, it should be extinct.”
Directions: Based on each person’s statement, identify if you agree or disagree by placing an Agree or Disagree next to the name and then explain your reasoning.
Courtney
Jose
Raquan
Mike
Keisha
Alex
Answers: 3
Biology, 21.06.2019 16:30, mckinleesmomp6qj1e
Which animal group is the largest and contains more species from all the other living groups combined? is it mammals or
Answers: 1
Biology, 22.06.2019 02:20, jothianddeepi
Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?
Answers: 3
Biology, 22.06.2019 05:00, emmalucilleblaha1995
Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation
Answers: 1
Your six friends are now exploring Ellsmere Island in Canada. On this Island, in 2005, scientists di...
Mathematics, 13.10.2019 09:01
Mathematics, 13.10.2019 09:10
English, 13.10.2019 09:10
Mathematics, 13.10.2019 09:10
Mathematics, 13.10.2019 09:10