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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.
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The feature present in reptiles and absent in amphibians that freed reptiles from dependence on water for reproduction is?
The amniotic egg is the feature present in reptiles and absent in amphibians that freed reptiles from dependence on water for reproduction. The amniotic egg has protective membranes and allows reptile embryos to develop on land, reducing the need for water for reproduction.
How is an amniotic egg important adaptation for reptiles?
The amniotic egg allows reptiles to reproduce on land, away from water.
Does the octopus have an amniotic egg?
No, reptiles, mammals and birds have amniotic eggs because they lay their eggs on land.
What advance allowed reptiles to reproduce away from water?
The Amniotic egg. Remember, reptiles are believed to have evolved from amphibians. Where do amphibians lay there eggs? - The water. Why? because their eggs are soft. The reptiles are the first to lay the amniotic egg which has a hard shell. If an amphibian tried to lay its egg on land, gravity would squad it because an amphibian's egg is jelly like. With the hard shell of the amniotic egg, reptiles have greater change of reproduction.
Is a chicken egg amniotic?
Yes, a chicken egg is considered amniotic because it contains an amniotic membrane that surrounds and protects the developing embryo inside the egg. This membrane helps provide a suitable environment for the embryo to grow and develop.
Is a amniotic egg a characteristic of a reptile?
It is not so simple. Most reptiles do have amniotic eggs, but a few species give live birth. Conversely, birds and monotreme mammals also lay amniotic eggs.
Does a squid have an amniotic egg?
No, squids do not have an amniotic egg. Amniotic eggs are characteristic of reptiles, birds, and some mammals, featuring a protective amniotic membrane. Squids belong to the class Cephalopoda and reproduce by laying eggs that are not amniotic; their eggs are typically encapsulated in a gelatinous mass and develop outside the mother's body.
What group evolved from the amphibians with the development of the amniotic egg?
reptiles
The feature present in reptiles and absent in amphibians that freed reptiles from dependence on water for reproduction is?
The amniotic egg is the feature present in reptiles and absent in amphibians that freed reptiles from dependence on water for reproduction. The amniotic egg has protective membranes and allows reptile embryos to develop on land, reducing the need for water for reproduction.
What allows reptiles to reproduce without water?
The Amniotic Egg
Vertebrates became truly terrestrial with the development of the amniotic egg in what?
reptiles
How is an amniotic egg important adaptation for reptiles?
The amniotic egg allows reptiles to reproduce on land, away from water.
What are two derived characteristics that allowed reptiles to become the first entirely terrestrial vertebrates?
Plato Users: A. Amniotic Egg, and Dry Scaly Skin.
Does an owl have an amniotic egg?
Mammals, birds, and reptiles lay amniotic eggs, so, yes, owls have amniotic eggs. Amniotic eggs contain a yolk and aid in gas and energy exchange.
Does the octopus have an amniotic egg?
No, reptiles, mammals and birds have amniotic eggs because they lay their eggs on land.
Do chondrichthyes have an amniotic egg?
No, chondrichthyes, which include sharks, rays, and skates, do not have an amniotic egg. Instead, many species of chondrichthyes reproduce through methods such as oviparity (laying eggs) or viviparity (live birth), with some species having adaptations like the development of embryos in a protective environment within the mother's body. The amniotic egg is characteristic of reptiles, birds, and some mammals, which allows for reproduction in terrestrial environments.
What advance allowed reptiles to reproduce away from water?
The Amniotic egg. Remember, reptiles are believed to have evolved from amphibians. Where do amphibians lay there eggs? - The water. Why? because their eggs are soft. The reptiles are the first to lay the amniotic egg which has a hard shell. If an amphibian tried to lay its egg on land, gravity would squad it because an amphibian's egg is jelly like. With the hard shell of the amniotic egg, reptiles have greater change of reproduction.
