Table of Contents
- 1 Why is Tiktaalik considered to be a transitional fossil?
- 2 What characteristics of the Tiktaalik are tetrapod like?
- 3 What makes Tiktaalik an example of a transitional form?
- 4 Why is Tiktaalik such an important transitional fossil quizlet?
- 5 What characteristics of Tiktaalik solidify it as a transition fossil?
- 6 Why are transitional organisms or fossils like Tiktaalik so important to our understanding of the evolutionary relationships among different taxonomic groups?
Why is Tiktaalik considered to be a transitional fossil?
So why is Tiktaalik referred to as a transitional creature? Its mix of characteristics of fish and of tetrapods suggest that it represents one of the moments in the transition between fish and tetrapods. them have found fossils.
What characteristics of the Tiktaalik are tetrapod like?
Tiktaalik retained both fish and tetrapod characteristics. Its fish characteristics include scales, fins, and gills, and its tetrapod characteristics include a neck, ribs capable of bearing weight, a flat head, dorsally positioned eyes, a fin skeleton, and ear notches (The University of Chicago, 2006).
What evidence do the Tiktaalik fossil findings provide that shows the transition from water to land?
The report shows that the animal 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.
What makes Tiktaalik an example of a transitional form?
First, Tiktaalik is more accurately described as a transitional form than a missing link. Tiktaalik, for example, had fins with thin ray bones, scales, and gills like most fish. However, it also had the sturdy wrist bones, neck, shoulders, and thick ribs of a four-legged vertebrate.
Why is Tiktaalik such an important transitional fossil quizlet?
Why is Tiktaalik considered a transitional fossil? It is a hybrid of an aquatic and terrestrial vertebrate. indirect dating of fossils based on their surroundings.
What features do Tiktaalik have that were intermediate between fish and tetrapods?
Tiktaalik shares anatomical features with both primitive fish and the first tetrapods. At first glance, it has features we readily associate with fish: fins, scales, and gills. But it also has a number of key features that differentiate it from its fishy contemporaries and make it very interesting to scientists.
What characteristics of Tiktaalik solidify it as a transition fossil?
Paleontologists have uncovered new fossils from Tiktaalik roseae, which, while still a fish, is considered a transitional fossil that also has traits common to the first four-footed animals. This more complete picture of Tiktaalik suggests that the creature had strong, mobile hind fins.
Why are transitional organisms or fossils like Tiktaalik so important to our understanding of the evolutionary relationships among different taxonomic groups?
Transitional fossils are important because they are visual evidence of one type of animal evolving into another type of animal. A transitional fossil always contains features of one type and features of another.
How did the great transition from fish to tetrapod occur?
How did the great transition from fish to tetrapod occur? Tiktaalik had a combination of fishlike and tetrapod-like characteristics. Fish and four-limbed animals have very similar embryos. Both fish and four-limbed animals are vertebrates.