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Which group of fishes are most closely related to the ancestral amphibians?
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∙ 13y ago
Birds. Reptiles are also vertebrates.
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∙ 13y ago
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What is considered the most recent common ancestor of living tetrapods?
a sturdy-finned, shallow-water lobe-fin whose appendages had skeletal supports similar to those of terrestrial vertebratesA Class of lobe-finned fishes known as Sarcopterygians is believed to have given rise to the amphibians and thence to all other air-breathing vertebrates. There are three main Subclasses -- the Rhipidistii, the Dipnoi, and the Actinistia or Coelocanths. The Rhipidistians are the ones that are ancestral to tetrapods. The oldest known amphibians have been found in rocks of the late Ordovicean Period.The Dipnoi are today's lung fishes -- the African, Australian, and South American. The African and South American types are similar in many ways and are probably fairly closely related. The Australian is quite different and is the only one of them that is capable of using its gills as well as its lung for gas exchange.The Coelocanths were thought to be extinct until the late 1930's when one was discovered in the ocean off the east coast of south Africa.
What organisms do jellyfish interact with?
Jellyfishes are closely related to corals.
What is the age of fishes and 1st amphibians?
The Permian period (280 to 248 million years ago) is known as the "The Age of Amphibians," because during the Permian, amphibians were abundant. I really didn't see anything as far as when the very first amphibians appeared. I would think they became dominant on land very quickly since they were the first land animals and had very little competition for food.
What receives blood from sinus venosus?
Sinus venosus is formed by the union of 2 post caval veins and 1 precaval vein. The sinus venosus receives deoxygenated blood and passes it into auricle in case of fishes and into right auricle in case of amphibians and reptiles.
What is study of amphibians?
Amphibians are creatures which spend part of their life in water and part of their life on dry land.Amphibians are one of the groups of vertebrates, and are characterized by being cold blooded and having moist skin, through which they can also absorb oxygen. They include frogs, toads, newts, salamanders (including axolotls) and caecilians, which all start their lives as eggs. They hatch out as tadpoles which breathe through gills and a spiracle. As they grow, they develop lungs and legs, and are able to leave the water and walk on land, apart from axolotls.Amphibians are members of the class Aviva sub phylum Vertebrate phylum Chordate's The class Amphibian includes frogs, toads, salamanders, newts and Cacilia's Amphibians are characterized by a glandular skin without external scales, by gills during development (and in adulthood in some), and by eggs that may have jelly coats but develop without formation of extra embryonic membranes such as the amnion. Most amphibians also have four limbs. Limbs and lungs are adaptations for life on land; the limbs evolved from the ancestral fishes' lobed fins. The scales and amenity egg evolved by reptiles are further adaptations for life on land and distinguish reptiles from amphibians. Amphibians, such as frogs, toads, salamanders, newts, and Guamanian are coldblooded animals that metamorphose from a juvenile, vertebration form to an adult, airbrushing form. Typically, amphibians have four limbs. Unlike other land animals amenities amphibians lay eggs in water, as their fish ancestors did. Amphibians are superficially similar to reptiles. It is a coldblooded vertebrate (it has a backbone) e.g. frog, toad, newt.. A cold blooded animal that spends its life both on water and on land. A vertebrate,eg.frogAn amphibian is a vertebrate, which has a backbone. It lives both on land and in the water. (like frogs, turtles, alligator) an amphibian is an animal that lives near the water such as a frog amphibians are animals that breath from their lungs amphibians are animals that are cold blooded and can only survive in wet condition and moist conditions.
Which group of fishes are most closely related to ancestral amphibians?
Tetrapods
Did ancestral amphibians appeared on earth about the same time as ancestral fishes?
True you dumb asses
Are reptiles more closely related to fishes or invertebrates?
Since they are vertebrates, they are most closely related to fish.
Are reptiles more closely related to mammals or to fishes?
Reptiles are more closely related to mammals.
Name the missing link between amphibians and fishes?
platypus
What is the difference of vertebrate?
Mammals,Reptiles,Amphibians,Birds,Fishes.
Are frogs fish or mammals?
No there is a group call F.A.R (fishes,amphibians, and reptiles). Fishes belong in the fish group and amphibians are double life lives in water and land. Reptiles are Alligators.
Which vertebrates are endothermic vs ectothermic?
Fishes, amphibians and reptiles are ectothermic while mammals and birds are endothermic.
What group of fishes gave rise to the amphibians?
Lobe-fin fish
What is the name for a string of eggs laid by a toad?
Known as 'spawn' which is a mass of eggs laid by fishes, amphibians, mollusks and amphibians
Is sand dollar a flower?
Sand dollar is not a flower. Sand dollar is a flat living marine creature. They are closely related to star fishes.
How are reptiles better adapted to living in the bioshere than fishes and amphibians?
bulus
