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6 How did the discovery of temporal skull holes help scientists determine phylogeny of amniotes?
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∙ 10y ago
How did the discovery of temporal skull holes help scientists determine phylogeny of amniotes
Wiki User
∙ 10y ago
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What is the definition of the term epididymis?
The epididymis is the male reproductive system. It is similar to the system found in cartilaginous fish but is found in all male amniotes, including human males.
What animals have a amnion?
No. Amniotes are a group of creatures whose eggs are adapted to live on land by use of one or more membrane layers surrounding the developing embryo, including placental mammals, egg laying mammals, reptiles and birds.
Does development of the atomic egg made early reptiles less dependent on water?
There is no such thing as an 'Atomic' egg.However, the amniotes are a group of four-footed animals with backbones or spinal columns that have a terrestrially adapted egg. Amniote embryos, whether laid as eggs or carried by the female, are protected and aided by several extensive membranes, including an amniotic sac that surrounds the fetus. The membrains protect the egg form drying out on land.There is such thing as an Amniotic egg tho its in my science book :P
Is a frog an amniote?
No they do not. The organisms that are classified as Amniota are birds, mammals, and reptiles. There organisms are believed to come from a primitive amniote in the precambrian era. The ancestor of the primitive amniote is an early tetrapod. This ancestor gave rise to ampbibians as well as the primitive amniote (which gave rise to mammals, reptiles, and birds). An Aminote just basically means that the organism has extraembryonic membranes (ie-allanotitic membrane, choronic membrane, yolk sac, and amniotic membrane).
Is a amniotic egg a characteristic of reptiles?
The amnion is a semi-permeable membrane that retains moisture within the egg, thus preventing it from drying out, but permits the exchange of gasses, thus enabling the developing animal to breathe. With its evolution, it became possible for the amniotes (such as reptiles) to lay their eggs away from water and still successfully reproduce, as all embryos need to develop in a moisture-rich environment. Amphibian eggs lack the amnion, just as all the early tetrapod eggs did, and they could never lay their eggs in a dry environment, as their embryos would die long before they fully developed.
Are curassows amniotes?
Currassows are one of the three major groups of birds known as cracids. Most of these birds live in South America. Amniotes are eggs that contain amniotic fluid in them. Currassow eggs do contain amniotic fluid, therefore currassows are amniotes.
How does anatomy and circulation differ among amniotes?
Amniotes differ from earlier vertebrates in that they can complete their life cycle on land rather than in water. Earlier vertebrates had to have water to lay eggs at the minimum. Amniotes developed eggs with amnios which allowed the eggs to be laid on land or carried by the mother.
What is the meaning of aminiotic sac?
sac in which the fetus develops in amniotes
Why don't amniotes need to return to water to reproduce?
ihaiu
Are these Amniotes vertebrates House sparrow garter snake African elephant?
Yes
Are leatherback sea turtless anphibians?
Leatherback Turtles are classified as amniotes, and unlike amphibians, don't lay their eggs underwater.
Reptiles and fish can be accurately classified as?
reptiles: tetrapods and amniotes fish: Vertebrata Subphylum See related links for more details
Are human beings related to reptiles?
Ultimately all organisms are related. Humans are mammals, which are not closely related to reptiles. Mammals and reptiles belong to a group of animals called amniotes, which they also share with birds. Amniotes include all land vertebrates except amphibians. The last common ancestor of mammals and reptiles lived over 300 million years ago in the Carboniferous period. Shortly after the first amniotes branched off from amphibians they split into synapsids, which became the ancestors of mammals, and sauropsids, which became the ancestors of birds and all modern reptiles.
Why are mammals considered to be amniotes even though most mammals do not produce an amniotic egg?
because they can internal fertilization and have water tight skin
What is the definition of the term epididymis?
The epididymis is the male reproductive system. It is similar to the system found in cartilaginous fish but is found in all male amniotes, including human males.
What are three common features with mammals and birds?
1. Both are warmblooded vertebrates. 2. Both are amniotes. 3. Both have their bodies covered with silky structures made from keratin.
Are animals related to birds?
Birds are more closely related to reptiles than they are to mammals. Birds, reptiles, and mammals all belong to a group of vertebrates called amniotes, which split off from amphibians. Amniotes split into two groups soon after they evolved: true reptiles and synapsids. Mammals are the only living synapsids today. Dinosaurs branched off from the reptiles and birds then evolved from the dinosaurs.
