Table of Contents
- 1 In which of the following groups did lungs first appear?
- 2 What organism represented the first vertebrates?
- 3 When did the vertebrate lung first appear?
- 4 What came first lungs or gills?
- 5 Which vertebrates evolved into the first amphibians?
- 6 What type of vertebrates existed before amphibians?
- 7 How do vertebrates breathe?
- 8 When did the first vertebrates appear?
- 9 What is the history of vertebrates?
In which of the following groups did lungs first appear?
Lungs appeared in bony fishes well before the fish-tetrapod transition. They existed in the ancestors of both the ray-finned fishes (Actinopterygii) and fleshy-finned fishes (Sarcopterygii).
What organism represented the first vertebrates?
Fishes were the earliest vertebrates, with jawless species being the earliest and jawed species evolving later. They are active feeders, rather than sessile, suspension feeders. Jawless fishes, such as lampreys, represent the first true vertebrate lineage.
When did the vertebrate lung first appear?
about 400 M years ago
The description of the evolution of Vertebrate lung is based on comparative anatomy and physiology, combined with phylogenetics. An air-breathing organ (ABO), in addition to gill respiration, appeared in fishes about 400 M years ago. It consisted of a single primitive lung ventilated by a buccal pump.
Where did vertebrates first appear?
coelacanths and lungfish. tetrapods (limbed vertebrates)…Number of extant species.
| Vertebrate groups | Jawed |
|---|---|
| Fish | |
| Class | lobe-finned fish |
| Estimated number of described species | 8 |
| Group totals | >32,900 |
What was the first amphibian?
The first major groups of amphibians developed in the Devonian period, around 370 million years ago, from lobe-finned fish which were similar to the modern coelacanth and lungfish. These ancient lobe-finned fish had evolved multi-jointed leg-like fins with digits that enabled them to crawl along the sea bottom.
What came first lungs or gills?
fish
Gills were present in the earliest fish, but lungs also evolved pretty early on, potentially from the tissue sac that surrounds the gills. Swim bladders evolved soon after lungs, and are thought to have evolved from lung tissue.
Which vertebrates evolved into the first amphibians?
The evolution of eggs meant that vertebrates were no longer tied to water for reproduction. 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.
What type of vertebrates existed before amphibians?
The only type of vertebrates that existed before amphibians evolved was bony fish. The other three types of vertebrates, known as reptiles, birds, and mammals, all evolved after amphibians evolved approximately 395 million years ago.
What was the first organism to evolve?
Prokaryotes were the earliest life forms, simple creatures that fed on carbon compounds that were accumulating in Earth’s early oceans. Slowly, other organisms evolved that used the Sun’s energy, along with compounds such as sulfides, to generate their own energy.
What was the first land vertebrate?
The first vertebrate on land were Amphibians and they evolved from lobe-finned fishes lungs. The largest group of vertebrates is the Fish.
How do vertebrates breathe?
All basal vertebrates breathe with gills. The gills are carried right behind the head, bordering the posterior margins of a series of openings from the pharynx to the exterior. Each gill is supported by a cartilagenous or bony gill arch.
When did the first vertebrates appear?
The first vertebrates appeared 530 million years ago. The first vertebrates appeared 530 million years ago.
What is the history of vertebrates?
Vertebrates are a well-known group of animals that includes mammals, birds, reptiles, amphibians, and fish. The defining characteristic of vertebrates is their backbone, an anatomical feature that first appeared in the fossil record about 500 million years ago, during the Ordovician period.