Which Evidence Supports the Hypothesis That Four-Limbed Animals Came from Fish?

Which Evidence Supports the Hypothesis That Four-Limbed Animals Came from Fish?

A great deal of evidence supports the hypothesis that four-limbed animals came from fish. One piece of Evidence is the similarity between the fish embryos and the other four-limbed animals. Another is that many four-limbed animals have gills at some point in their development.

Finally, there are fossilized remains of creatures that appear to be transitional forms between fish and four-limbed animals. Taken together, this Evidence strongly suggests that four-limbed animals did come from fish.

A lot of Evidence supports the hypothesis that four-limbed animals came from fish. One piece of Evidence is that many four-limbed animals have gills at some point in their life cycle. This suggests that they share a common ancestor with fish.

Another piece of Evidence is the similarities in structure between the limbs of four-limbed animals and the fins of fish. The bones in both sets of limbs are arranged similarly, and both groups of animals use muscles to move their limbs. This hypothesis is further supported by the fact that many four-limbed animals live in water at some point.

This suggests that they are more closely related to fish than to other groups of land-dwelling animals. Finally, several fossilized transitional forms between fish and four-limbed animals have been found.

What does Evidence suggest That Four-Legged Animals Evolved from Fish?

There is a great deal of Evidence that suggests that four-legged animals evolved from fish. One line of Evidence comes from the fossil record. Early tetrapods (four-legged animals) such as Acanthostega and Ichthyostega have many features in common with fish, including gills, fins, and a tail.

Another line of Evidence comes from comparative anatomy. For example, the bones in the legs of tetrapods are very similar to those in fish fins. Finally, molecular Evidence supports the idea that tetrapods evolved from fish.

For example, comparisons of DNA sequences show that tetrapods and lungfish (a type of fish) are more closely related to each other than other types of fish.

What does Evidence suggest That Tetrapods Came from Fish?

The first tetrapods were fish. The Evidence is that the first tetrapods had many features in common with fish, including a tail, fin rays, and gills. The first tetrapods also had a few unique features, such as legs and lungs.

This suggests that tetrapods evolved from fish. Several pieces of Evidence support this idea. First, the fossil record shows that the first tetrapods appeared during the Devonian period when the first fishes appeared.

Second, molecular Evidence shows that tetrapods and fish share a common ancestor. Third, developmental Evidence shows that the development of Tetrapods is similar to the development of fishes. All of this Evidence suggests that Tetrapods did indeed evolve from fish.

It is likely that they arose in freshwater environments and then eventually colonized land. This would explain why most modern Tetrapod species are amphibious or aquatic; they return to their roots!

What Fossils Provide Evidence That Amphibians Came from Fish?

Fossils are one of the main pieces of Evidence that scientists have to study the history of life on Earth. They can provide information about when a certain species lived, its environment, and how it might be related to other species. One group of fossils that is particularly important for understanding the origins of amphibians is a set of Devonian-period fish called rhipidistians.

These fish were among the first to possess many characteristics that would later be seen in amphibians, including: -A skull with bones arranged in a way that allowed for increased mobility and flexibility -Limb-like structures called pectoral fins that could be used for walking or crawling on land.

-An enlarged braincase containing nerves and muscles needed for hearing and balance While there are still some debates about exactly how rhipidistians are related to modern-day amphibians, there is no doubt that they represent an important step in the transition from fish to four-legged animals.

Why Have We Not Found Examples in the Fossil Record of Every Animal That Ever Lived?

The fossil record is a collection of all the fossils found. It contains a lot of information about the history of life on Earth. However, it still needs to be completed.

Many animals that lived long ago have not been found as fossils. This does not mean that they did not exist. It just means that their remains have yet to be preserved in the fossil record.

There are several reasons why we have yet to find examples in the fossil record of every animal that ever lived. First, only a small percentage of animals become fossils. Most animals die and decompose before they have a chance to be fossilized.

Second, even if an animal dies and is buried in sediments, it might not be preserved as a fossil. The conditions need to be just right for fossilization, and this doesn’t happen often. Third, even if an animal is preserved as a fossil, humans may never find it.

There are millions of fossils out there waiting to be discovered! Despite these challenges, scientists continue to learn much from the fossil record.

What Kind of Habitat Did Tiktaalik Live In?

Tiktaalik is an extinct genus of fish that lived during the Late Devonian period, about 375 million years ago. It is notable for its transitional features, which represent a mosaic of primitive and derived traits. Tiktaalik had a crocodile-like head on a fish-like body and was well adapted to living both in water and on land.

The habitat of Tiktaalik would have been similar to that of other fish living during the Late Devonian period. It inhabited freshwater rivers and lakes, feeding on smaller fish and invertebrates. Tiktaalik probably spent part of its time out of the water, using its pectoral fins to crawl onto land in search of food or mates.

Which of These Primate Groups is Most Closely Related to Humans?

As humans, we are classified as primates. There are two main groups of primates: the New World monkeys and the apes. The New World monkeys include marmosets and tamarins, while the apes include gorillas, chimpanzees, orangutans, and humans.

So which of these primate groups is most closely related to humans? The answer may surprise you: it is the New World monkeys! Although apes and humans share a common ancestor, we diverged from them around 25 million years ago.

In contrast, the New World monkeys split from our common ancestor around 40 million years ago. However, due to millions of years of evolution, both groups have changed significantly since then. Despite this difference in time since divergence, several similarities between New World monkeys and humans suggest a close relationship.

For example, both groups have forward-facing eyes that provide binocular vision – meaning they can see in three dimensions. This is an advantage for predators (like us) who must judge distances accurately when hunting prey. Additionally, humans and New World monkeys have opposable thumbs – meaning we can grip objects tightly with our hands.

This allows us to use tools – another similarity between these two groups! So next time you look at a marmoset or tamarin at your local zoo, remember that these creatures share some key features with us – making them our closest living relatives in the animal kingdom!

What Kind of Habitat Did Tiktaalik Live in Quizlet

Tiktaalik is a genus of extinct fish that lived approximately 375 million years ago, during the Late Devonian period. “Tiktaalik” comes from the Inuktitut word for “large freshwater fish.” Tiktaalik fossils have been found in North America and Europe.

The first Tiktaalik fossil was discovered in 2004 by a team of scientists led by Neil Shubin. Since then, several other Tiktaalik fossils have been found. The complete specimen, which includes a nearly complete skeleton, was discovered in 2006.

Tiktaalik was a large fish that grew to be about 9 feet (2.7 meters) long. It had fins and limbs, making it well-adapted to living in water and on land. Its eyes were on the top of its head, giving it good vision above and below the water’s surface.

TIKTAALIK HABITAT Tiktaalik probably lived in shallow freshwater environments such as lakes, ponds, and rivers. It likely fed on smaller fish and invertebrates.

Which of the Following is True About the Origin of Birds

Birds are some of the most beloved animals on Earth, and their origin story is fascinating and complex. Here are four things you may have yet to learn about the evolution of birds: 1. Birds are thought to have evolved from a group of small, feathered dinosaurs known as theropods.

Theropods were fast and agile predators with sharp claws and teeth – perfect for catching prey. Over time, some theropods developed longer legs and arms, which helped them climb trees and gave them an advantage in hunting. 2. The first birds appeared around 150 million years ago during the Jurassic period.

These early birds were probably similar to today’s modern birds in size and appearance. However, they likely did not have the same type of feathers we see today; instead, their feathers may have been more like those of reptiles or mammals. 3. Birds are unique among animals because they have wings with feathers that allow them to fly.

This adaptation likely occurred over millions of years as different groups of birds experimented with different wing designs. Eventually, settling on the current configuration we see today. 4. While many think of birds as being closely related to reptiles, this is not the case!

DNA evidence suggests that birds are more closely related to mammals than reptiles (a finding that was quite surprising to scientists).

Based on the Phylogenetic Tree Shown Here, Identify the Basal Taxon of Metazoans (Animals).

The basal taxon of metazoans, or animals, is the phylum Porifera. This species includes sponges, some of the simplest and earliest-evolving animals. Sponges are thought to have evolved from a single ancestor around 600 million years ago.

They are mostly sedentary creatures attached to hard surfaces in aquatic environments. Although they lack many features we typically think of as “animal-like,” sponges are complex organisms that play important roles in their ecosystems.

Which of the following is a Tetrapod?

There are many different types of animals worldwide, but not all are tetrapods. So, what is a tetrapod? A tetrapod is an animal that has four limbs or legs.

This can include anything from mammals to reptiles to amphibians. Some examples of tetrapods include humans, dogs, cats, frogs, and snakes. While many different types of animals are considered tetrapods, there are also some that are not.

For example, birds only have two legs, so they would not be considered tetrapods. In addition, some fish have developed four limbs, but they typically don’t use them for walking on land as other tetrapods do. So why is it important to know which animals are classified as tetrapods?

Well, it can help you understand how different animals move around. For example, you might expect a bird to move differently than a dog because one has two legs and the other has four. Additionally, knowing which animals are considered tetrapods can help you understand their evolutionary history.

After all, all tetrapods share a common ancestor!

Can You Identify the Animal Phylum to Which Each Example Or Characteristic Belongs?

If you’re an animal lover, you probably already know quite a bit about the different animal species. But did you know that you can identify the species to which each example or characteristic belongs? Let’s put your knowledge to the test!

For each of the following items, try identifying which animal species it belongs to 

1. A snake shedding its skin 

2. A dog wagging its tail

3. A cat licking its paw 4. A bird is flying south for the winter. You would be correct if you said: “reptiles” for number one and “mammals” for numbers two and three!

As for number four, that would be our friends in the bird species.

The Discovery of the Fossil Archaeopteryx Provided Evidence That Birds Evolved from Mammals

The discovery of the fossil Archaeopteryx in 1861 was major evidence supporting the theory that birds evolved from mammals. Archaeopteryx was a small, bird-like creature that lived during the Late Jurassic period, around 150 million years ago. It had many features similar to birds and reptiles, such as feathers and clawed fingers.

However, it also had some distinctly mammalian features, such as teeth and a breastbone. This discovery showed a clear link between birds and mammals and helped solidify the idea that birds had evolved from earlier reptilian ancestors. Over the years, many more fossils have supported this theory.

For example, there are now numerous examples of feathered dinosaurs, which show an intermediary stage between fully reptilian and fully avian creatures. Today, the discovery of Archaeopteryx is still considered one of the most important pieces of Evidence for evolution by natural selection. It is a beautiful example of how new species can emerge through gradual changes over time, ultimately leading to the incredible diversity we see today.


The Evidence for the hypothesis that four-limbed animals came from fish is strong. The first piece of Evidence is the similarities between the embryos of fish and four-limbed animals. Both have a structure called a notochord, which provides support for the developing spinal cord.

The second piece of Evidence comes from studying the DNA of living organisms. The DNA of fish and four-limbed animals is very similar, indicating that they share a common ancestor. Finally, many fossils of extinct creatures appear to be transitional forms between fish and four-limbed animals.

These fossils have features of both groups, such as fins with bones.