Typical animal embryos have ________, or external cell layer, and ________, which lines the digestive tract.

Question

Quizplus · Accepted Answer

The ectoderm is the outermost layer of cells in animal embryos, while the endoderm lines the digestive tract. Therefore, option B, which states that animal embryos have an ectoderm and an endoderm, is the correct answer. Option A is incorrect because a blastula is an early stage of embryonic development and not a layer of cells. Option C is incorrect because it is the opposite of what is true for animal embryos. Option D is also incorrect because a mesoderm is the middle layer of cells in animal embryos and a gastrula is a stage of embryonic development that occurs after the blastula stage.

Typical Animal Embryos Have ________, or External Cell Layer, and ________

Typical Animal Embryos Have , or External Cell Layer, and