Identify the pattern of embryonic development shown in each drawing below and name the phylum (or phyla) that exhibit this pattern.

Question

Illustration showing ectoderm and endoderm layers in embryonic development.

Accepted Answer

Hi everyone here's our next problem. It says the protest ohm and a terrorist. OEM are discussed below in a number of ways identified. The option that includes the correct statements about protest. OEMs and terrorist. OEMs we've got four statements here. P. Q. R and S. And then our answer choices A, B, C and D. Are different combinations of those letters. And we need to know which answer choice contains the correct statements. So let's go through our statements and determine which ones are true. Statement P says in protest. OEMs, the first opening in the embryo becomes the mouth and this is true. We're going to call for more content videos. That's a determined characteristic of proto stones. That distinguishes them from the stones that first opening the blast of war in the embryo becomes the mouth. So this is true. So we will circle statement P statement Q. Says into terra stones. The first opening in the embryo becomes the anus and the mouth develops later. This is also true. Again, that's that distinguishing kind of main distinguishing feature between the two that in protest. OEMs the first blast a poor becomes the mouth into terra stones becomes the anus. So Q. Is also a correct statement and statement are says the majority of protest OEMs are vertebrates. Well this is a false statement. The majority of protest OEMs are invertebrates so we're gonna cross out our that is not correct. So we can immediately eliminate. And again if we were on a test and in the interest of time we're going to eliminate any answer choice that includes letter are so A. Is not our answer and D. Is not our answer. We're just between B. And C. So finally we'll look at uh statement S. Which says to tear stones contains both invertebrates and vertebrates. This is true. Um Stones contains vertebrates but also has invertebrates in the form of sea creatures with radial symmetry like starfish and sea urchins. So statement S. Is also true. So we've got our correct statements of P. Q. And S. And we will look at our answer choices. We see that choice B. Is P. Q. And S. Choice C. Does not include p statement piece so we can eliminate that. And we should note that again if we were going through tests, we need to be in a hurry, we could have eliminated answer choice C. Because it doesn't conclude statement P. Before we'd even gotten down to statement S since both B and C contain us. So again, proto stones into terror stones which are the correct statements, statement P and protest owns. The first opening of the embryo becomes the mouth statement Q. Stones. The first opening of the embryo becomes the anus and statement estructura Stones contains both invertebrates and vertebrates. See you in the next video

Identify the pattern of embryonic development shown in each drawing below and name the phylum (or phyla) that exhibit this pattern.

Verified video answer for a similar problem:

Key Concepts

Germ Layers

Embryonic Development Patterns

Phyla Classification