how are reptile eggs and amphilbian eggs different?

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  • 1 decade ago
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    Here is what I can tell you from my Tutorial notes:

    1- One is water-proof, one is not.

    Reptilian eggs are laid on dry land. They have a water-proof shell and contain sufficient nutritive material (yolk and albumen) for the developing embryo. Such eggs are called Cleidoic eggs.

    Amphibian eggs are laid in water, not protected by shells and without sufficient nutritive material for the complete development of the embryo. They are called Non-cleidoic eggs. Generally, a non-cleidoic egg hatches into a larva.

    2- One has lots of yolk, one has a little less.

    Reptilian eggs have enormous quantity of yolk. They are called Macrolecithal or Megalecithal or polylecithal eggs. (lecithal = yolk containing)

    Amphibian eggs, on the other hand, have a moderate quantity of yolk; neither enormous nor very small. Such eggs are called Mesolecithal eggs.

    3- One has yolk at one pole and nucleus at the other while the other's yolk just pushes the nucleus out of the egg.

    Before telling you about this difference, let me tell you what "animal pole" and "vegetal pole" are in relation to an egg-

    In an egg cell, the pole which is closer to the nucleus is called the animal pole. On the other hand, the opposite pole which is usually more yolk laden is called the vegetal pole.

    So, in most amphibians, yolk is heavy at the vegetal pole and thinner towards the animal pole. Such an egg is called a Telolecithal egg which is different from the "Homolecithal egg" (having a uniform distribution of yolk throughout the cytoplasm).

    While, in reptiles, the eggs are "Extremely telolecithal" meaning that the yolk is so heavy that it pushes the nucleus to the cell membrane and lies in the form of a small "germinal disc" (Blastodisc) at the animal pole.

    ****************

    Ok, there you have your answer, I guess.

    Hey! I didn't write it because you offered points and ratings. I just liked your name- Lily. Points won't hurt either though....

    Ok, I am just kidding... I just hope you get your answer from what I told you above.

  • 1 decade ago

    The short answer:

    Reptiles (and humans too, btw) are part of Amniota. Amniota have a hull around the embryo, the amnion, which makes the egg independent from water.

    Amphibians are Anamnia and must lay their eggs in a water-environment.

  • 1 decade ago

    Reptile eggs have a leathery shell and are often buried in the ground/sand/leaves. Amphibian eggs require much more water and are surrounded by a gel like substance. They are laid and hatch in the water.

    Source(s): I teach biology
  • 1 decade ago

    The main difference is that reptile eggs have a harder leathery shell, so can be laid on land. They also come from internal fertilisation.

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  • 1 decade ago

    Amphibian's eggs need to be moist or underwater to develop sense they are covered in jelly so predators have a hard time geting to them.Reptilians need to be hidden on dry land or protected by a big mean mama jama!!!!!!

    Source(s): studies...
  • 1 decade ago

    The Biology teacher said it. But there is more: there are many different types of both species. If you line them up and check, you will find many differences you'll have to specify exactly...

    Amphibians do breed in water, even giant toads...

  • ?
    Lv 6
    1 decade ago

    I don't know but they both taste horrible

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