[Campbell Biology P.732] Which of the following statements accurately describes the characte... | Practice Question

Which of the following statements accurately describes the characteristics of animal clades as presented in the text?

  • A: Eumetazoans are defined by the presence of bilateral symmetry and three germ layers.
  • B: The clade Bilateria includes all animal phyla, and its members are exclusively invertebrates.
  • C: Deuterostomia, Lophotrochozoa, and Ecdysozoa are the three main lineages of Bilaterians, with Lophotrochozoa often characterized by a lophophore or trochophore larva.
  • D: Porifera are the sister group to Eumetazoa, and both clades are characterized by the presence of muscle and nervous tissues.

Explanation

The text states that Bilaterians are divided into three main lineages: Deuterostomia, Lophotrochozoa, and Ecdysozoa point 5 . It also details that Lophotrochozoa refers to features like the lophophore or trochophore larva Figure 32.12 and accompanying text . Option A incorrectly describes Eumetazoa; B is incorrect because not all phyla are Bilateria and Chordata includes vertebrates; D is incorrect because Porifera lack true tissues.