According to what evidence does the concept that four-limbed creatures evolved from fishes hold water? -According to DNA study, fish are the closest living cousins of tetrapods. – Before the development of tetrapods, around 365 million years ago, the fossil record reveals an increasing number of tetrapod-like fish. – Vertebrates include both fish and animals with four limbs.
- 1) According to DNA study, fish are the closest living cousins of tetrapods. 2) Vertebrates include both fish and animals with four limbs. 1) Four-limbed creatures have been on Earth since the beginning of time, according to fossil evidence.
Why have we not found examples in the fossil record of every animal that ever lived on Earth?
When we go through the fossil record, we don’t find instances of every animal that has ever existed on Earth. – Many fossils have been buried for thousands of years. The only way we can locate them is if they have been exposed by erosion or excavation. During the process of becoming a fossil, an animal has to be immediately and fully submerged in ash or silt before it has the opportunity to disintegrate.
How did the great transition from fish to tetrapod occur?
The major shift from fish to tetrapod occurred in a number of ways. Tiktaalik has a mix of traits that were both fishlike and tetrapodlike. The embryos of fish and four-limbed animals are strikingly similar. Vertebrates include both fish and animals with four limbs.
What term refers to four-limbed animals?
A quadruped is an animal or machine that typically maintains a four-legged stance and moves using all four limbs. Quadrupeds include humans and other animals (from Latin quattuor for “four”, and pes, pedis for “foot”).
Why did Shubin and Daeschler search in the Canadian Arctic for fossil evidence?
Why did Shubin and Daeschler go searching for fossil evidence of the transition from fish to tetrapods in the Canadian Arctic in the first place? They speculated that the transitional fossils were found in sedimentary strata that were older than 365 million years ago, which corresponded to the time when the first tetrapods appeared in the fossil record, according to the study.
Which of the following pieces of evidence supports the hypothesis that birds evolved from theropod dinosaurs?
Evidence from theropods and contemporary birds shows that early feathers may have served a variety of roles, including insulation, communication, and/or display, before becoming co-opted for use in flying later in evolution. The discovery gave proof that species descend from other species through alteration.
Which of the following statements best represents evidence supporting the leading hypothesis regarding the evolution of jaws in vertebrates?
Choose the statement that best demonstrates evidence in favor of the dominant hypothesis regarding the development of jaws in vertebrates from the list below. The same sort of embryonic cells that make up the jaws and gill supports are also used to make the gill supports. Which of the following statements regarding deuterostomes is true? Fish fins were the ancestors of tetrapod limbs.
Which evidence supports the fact that tetrapods and fish are closely related?
The existence of such data supports the hypothesis that tetrapods and fish are closely related. The embryos of contemporary fish and tetrapods are quite similar in appearance. Modern fish and tetrapods are both classified as vertebrates. The DNA of current fish and tetrapods reveals that they have a common ancestor, according to the theory of evolution.
How does Tiktaalik provide evidence for the evolution of tetrapods and land dwelling vertebrates?
An important change in the history of life is revealed by Tiktaalik, who gives hints about it. It is believed to have been a close relative of our own forebears — the first animal to grow four limbs and crawl out onto dry ground — but it has now gone extinct. Tiktaalik, for example, possessed fins with thin ray bones, scales, and gills, much like the majority of other fishes had.
What hypothesis did the paleontologists who discovered Tiktaalik test?
The discovery of fish fossils in the Canadian Arctic is contradicting the evolutionary paradigm known as the “front-wheel drive” hypothesis, which states that hind limbs did not begin to emerge until organisms began to live on land.
When fish gave us the finger this ancient four limbed fish reveals the origins of the human hand?
This tetrapod-like fish existed more than 380 million years ago and belongs to a group known as the elpistostegalians, which means “elpistostegalians” in Greek. Our research, which was based on this specimen and published today in Nature, reveals that human hands are most likely descended from the fins of this fish, which we’ll refer to as Elpistostege for the rest of this discussion.
How did amphibians evolve from fish?
As a result, whereas most amphibians begin their lives as larvae in water, several species have evolved behavioral adaptations that allow them to avoid this. It was during the Carboniferous period that the first amphibians (“crown”) appeared, descended from sarcopterygian fish with lungs and bony-limbed fins, characteristics that were beneficial in their adaptation to dry land.
Do fishes have four limbs?
Tetrapods, or creatures with four limbs, descended from fish that made the transition from the sea to the land. Fish, as a result, lack the ability to move their limbs.
What kind of habitat did Tiktaalik live in quizlet?
What type of environment did tiktaalik have to live in? Tiktaalik thrived in a swampy environment with warm waters. Tiktaalik has a mix of traits that were both fishlike and tetrapodlike.
During which period did insects become abundant on earth?
The Permian epoch is credited with the development of the majority of current insect orders. Many of the early groups became extinct during the mass extinction at the Permo-Triassic boundary, the biggest extinction event in the history of the Earth, which occurred around 252 million years ago and was the largest extinction event in the history of the Earth.
Which statement best summarizes the difference between ectothermic and endothermic organisms?
Identify which of the following statements most accurately describes the distinction between ectothermic and endothermic creatures. Ectotherms absorb heat from the environment, but endotherms generate heat through their metabolism to maintain a warm, constant body temperature.