Open QuestionName two phyla of animals that are radially symmetric and two that are bilaterally symmetric. How do the general lifestyles of radial and bilateral animals differ?
Open QuestionThe table below lists the common names of the nine animal phyla surveyed in this chapter. For each phylum, list the key characteristics and some representatives.
Open QuestionWhich synapomorphy (shared, derived trait) distinguishes animals as a monophyletic group, distinct from choanoflagellates?a. multicellularityb. colonialityc. heterotrophyd. movement
Open QuestionThe distinction between sponges and other animal phyla is based mainly on the absence versus the presence ofa. a body cavity.b. a complete digestive tract.c. mesoderm.d. tissues.
Open QuestionIdentify the pattern of embryonic development shown in each drawing below and name the phylum (or phyla) that exhibit this pattern.