Sentences with phrase «first vertebrate animals»

KNOXVILLE — Around 390 million years ago, the first vertebrate animals moved from water onto land, necessitating changes in their musculoskeletal systems to permit a terrestrial life.

Around 390 million years ago, the first vertebrate animals moved from water onto land, necessitating changes in their musculoskeletal systems to permit a terrestrial life.

Sex hormones, including testosterone, evolved 500 million years ago — before the first vertebrate animals — from the «mother» of all steroid hormones, estrogen.

Not exact matches

This evidence was crucial because only vertebrates have two different shapes of melanosome, meaning that unlike previous researchers that thought that Tullimonstrum was an invertebrate (animal without a backbone), this is the first unequivocal evidence that Tullimonstrum is a member of the same group of animals as us, the vertebrates.»

By comparing the genomes of 203 vertebrates, they first traced the origin of KZFPs back to a common ancestor of tetrapods (four - legged animals) and coelacanth, a fish that evolved over 400 million years ago.

For the first time, researchers have investigated the cheetah's extraordinary sensory abilities by analyzing the speedy animal's inner ear, an organ that is essential for maintaining body balance and adapting head posture during movement in most vertebrates.

In their first paper, published in the Journal of Vertebrate Paleontology in 1997, Schweitzer, Horner, and colleagues reported that spectroscopy and chemical analyses of extracts from a T. rex femur suggested preserved proteins, including a form of collagen abundant in modern animal bones.

While we only get to see the vertebrate collection — missing the first diverse animal fauna of Ediacara — it would be hard to cover a broader realm in so much detail.

Vertebrate animals also made their first appearance in the Cambrian Explosion, the distant ancestors of modern fish, reptiles, birds and mammals.