Table of Contents
- 1 Did four legged animals come from fish?
- 2 What evidence was found to explain the relationship between the Tiktaalik leg and fish fins?
- 3 How did tiktaalik provide evidence that amphibians evolved from fish?
- 4 How many Tiktaalik have been found?
- 5 How did tetrapods evolved from fish?
- 6 How does tiktaalik provide evidence for the evolution of tetrapods and land dwelling vertebrates?
- 7 What do tiktaalik fossils tell us?
- 8 What is the difference between a fish and a tetrapod?
Did four legged animals come from fish?
Despite their different external appearances, there are revealing similarities. First, fish and tetrapods are vertebrates. Finally, DNA Page 2 analysis shows that fish are tetrapods’ closest relatives. All of this suggests four-legged animals did indeed come from fish.
What evidence was found to explain the relationship between the Tiktaalik leg and fish fins?
The discovery of well-preserved pelves and a partial pelvic fin from Tiktaalik roseae, a 375 million-year-old transitional species between fish and the first legged animals, reveals that the evolution of hind legs actually began as enhanced hind fins.
How did animals evolve from fish?
Amphibians, reptiles, mammals, and birds evolved after fish. The first amphibians evolved from a lobe-finned fish ancestor about 365 million years ago. They were the first vertebrates to live on land, but they had to return to water to reproduce. This meant they had to live near bodies of water.
Which of the following lines of evidence supports the fact that tetrapods and fish are closely related?
Which evidence supports the fact that tetrapods and fish are closely related? The embryos of modern fish and tetrapod look similar. Both modern fish and tetrapods are vertebrates. The DNA of modern fish and tetrapods suggests that they have a common ancestor.
How did tiktaalik provide evidence that amphibians evolved from fish?
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.
How many Tiktaalik have been found?
Excellent fossils were found in 2004 on Ellesmere Island in Nunavut, Canada. Tiktaalik skull showing spiracle holes above the eyes. Tiktaalik lived approximately 375 million years ago….2007 Schools Wikipedia Selection. Related subjects: Birds.
Kingdom: | Animalia |
---|---|
Genus: | Tiktaalik |
Species: | T. roseae |
How did Tiktaalik provide evidence that amphibians evolved from fish?
Which evidence would scientist use to make the connection between ancestry of fish and tetrapod using Tiktaalik roseae?
Fossils provide scientists with evidence that allows them to hypothesize how living organisms have evolved over time. Tiktaalik roseae was a unique organism that has been nicknamed the “fishapod” because it is believed to be a species had traits of both fish and tetrapods, the first four-legged animals.
How did tetrapods evolved from fish?
Tetrapods evolved from a finned organism that lived in the water. The common ancestor of all those different organisms (ray-fins, coelacanths, lungfishes, tetrapods, etc.) was neither a lobe-fin nor a ray-fin. This ancient vertebrate lineage had fins (with lepidotrichia), scales, gills, and lived in the water.
How does tiktaalik provide evidence for the evolution of tetrapods and land dwelling vertebrates?
Tiktaalik provides clues about a key transition in the history of life. Now extinct, this organism was a close relative of one our own ancestors — the first vertebrate to evolve four limbs and crawl out onto dry land. Tiktaalik, for example, had fins with thin ray bones, scales, and gills like most fish.
How did fish evolve into four-legged land animals?
Tiktaalik fossils reveal how fish evolved into four-legged land animals. 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.
Did fish have a four-wheel drive before tetrapods?
He described the transition as moving from “front-wheel drive” in fish to “four-wheel drive” in four-legged land animals, or tetrapods. “It turns out that the size of the hind appendage was already large in fish and that a good chunk of the transition has already happened in fish before the origin of tetrapods,” he said.
What do tiktaalik fossils tell us?
Tiktaalik fossils reveal how fish evolved into four-legged land animals. Zerina Johanson, a vertebrate palaeontologist at the Natural History Museum in London, said: “Tiktaalik is one of the most important fish fossils for unravelling the evolutionary transition from fish living in water to tetrapods living on land.
What is the difference between a fish and a tetrapod?
An important difference between fish and tetrapods, in terms of types of locomotion, is that fish tend to have larger limbs and girdles at the front of their body – the ‘front-wheel’ drive hypothesis – while tetrapods had substantially larger rear, or pelvic girdles.