Which of these does not produce an amniotic egg? Choose more than one answer if correct. a. bony

step 1 Hi, everyone. This is Problem 15 from the Chapter 29 problem set. The question is, which of thes

Which of these does not produce an amniotic egg? Choose more...

Key Concepts

Amniotic Egg

An amniotic egg is a type of egg characterized by the presence of extraembryonic membranes that include the amnion, chorion, and allantois, which collectively provide protection and facilitate gas exchange for the developing embryo. This adaptation allows the egg to be laid on land without the risk of desiccation, marking a significant evolutionary step among vertebrates.

Amniotes

Amniotes are a group of tetrapods—including reptiles, birds, and mammals—that produce amniotic eggs or have similar embryonic adaptations. This evolutionary group diverged from amphibians due to the development of an internal or external amniotic egg, enabling reproduction in a terrestrial environment.

Non-Amniotic Reproduction

Non-amniotic reproduction refers to reproductive methods used by vertebrates such as bony fishes and amphibians, which do not form amniotic eggs. These organisms typically rely on external fertilization and lay eggs in aquatic environments, lacking the extraembryonic membranes that protect and support the embryo in amniotic eggs.

Transcript

00:01 Hi, everyone.

00:01 This is problem 15 from the chapter 29 problem set.

00:06 The question is, which of these does not produce an amniotic egg? our answer choices are a, bony fishes, b, a duckville platypus, c, a snake, d, a robin, or e, a frog.

00:23 And we are to choose as many answers as are correct.

00:27 So we're looking for which of these organisms do not produce amniotic eggs.

00:33 So i think the first thing we need to do is look at what is an amniotic egg.

00:42 An amniotic egg is an egg that is equipped with what's called an amnion.

00:47 An amnion is a membrane around the embryo that contains fluid.

00:54 And this is inside the egg.

00:57 So the reason this is helpful is because since the amnion contains fluid in which the embryo can grow and develop, that means the embryo is able to continue to develop and survive outside of water.

01:15 So there are actually a group of organisms called, and these organisms are called amniotes, and included in this group are reptiles, birds, and mammals.

01:29 And you can see how that makes sense because reptiles, birds, and mammals all live on land, and they need to be able to produce eggs that can survive on land.

01:38 And that's why the amnion is helpful.

01:40 What you don't see are things like fish or amphibians, because both fish and amphibians live in water.

01:49 Therefore there's no need for an amnion.

01:51 They produce their eggs in water.

01:53 There's no need for a fluid -filled membrane.

01:56 The embryo will just survive and develop inside the water.

02:02 So the easiest way to answer this question, now that we've determined which kinds of organisms are amniotes and which are not, is to look at what kinds of organisms we have in our answer choices...

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