Ch 32.docx

Ch 32 All animals share features of major importance and are therefore: diverse in appearance and behavior. The five key innovations in animal evolution include tissues, a body, various patterns of embryonic development, segmentation, and: cavity. All animals exhibit some form of body symmetry excep...

Ch 32 All animals share features of major importance and are therefore: diverse in appearance and behavior. The five key innovations in animal evolution include tissues, a body, various patterns of embryonic development, segmentation, and: cavity. All animals exhibit some form of body symmetry except: sponges. Choose the statement that most accurately describes the presence of tissues in animals: Specialized tissues are found in all animals except sponges. What best explains why animals are considered monophyletic? They share features of major importance. Unlike the digestive cavity, the body cavity is: isolated from the exterior of the body. How does a heterotrophic organism obtain energy and organic molecules? Ingestion of other organisms. Animals that undergo embryonic development where the embryonic blastopore develops to become the animal's mouth are: Protostomes. Select the key innovations in animal evolution: Body cavity, segmentation, symmetry, tissues, various patterns of embryonic development. What accurately describes animals with a segmented body plan? The animal's body is divided into nearly identical units. The only animals that lack any form of body symmetry are: sponges. Traditional views of animal phylogeny have depended on features of and embryological development: anatomy. In all animals except , cells differentiate into specialized which are groups of cells that take on particular functions in the animal's body: sponges. What is true regarding molecular and traditional analysis of phylogenies? Though there are differences between the two phylogenies, there is much agreement in the deep parts of the evolutionary tree. Advantages of a body cavity include: cushioning internal organs, circulating materials, fostering developmental interactions. Protostomes are animals in which the embryonic blastopore becomes the: mouth. Which of the following are the two major clades of protostomes? Ecdysozoa, Lophotrochozoa. What is a type of body plan in which an animal's body is divided into nearly identical units? Segmented body plan. Which phyla contain Deuterostomes? Echinoderms, Chordates. What has helped to resolve the relationships between most animal phyla? Combining data from multiple genes. Why are noncoelomate invertebrates, such as sponges and jellyfish, and noncoelomate worms, evolutionarily important? They possessed the basic animal body plan from which the body plan of all other animals evolved. What clade includes all animals that have true tissues and body symmetry? Eumetazoa. In cnidarians, what is a medusa? The free-swimming form that is umbrella-shaped with a mouth on the concave underside, surrounded by tentacles. What are characteristics of cnidarians? They are diploblastic, they have radial symmetry, they are made of distinct tissues. The flagellated cells that line the internal cavity of a sponge and help water flow through the ostia are known as: Choanocytes. What are members of phylum Ctenophora called? Comb jellies. Which term refers to the unique stinging intracellular structures of cnidarians? Nematocysts. What cnidarian form is characterized by a cylindrical body with a mouth surrounded by tentacles at the end of the cylinder opposite where it is attached to substrate or colonial tissue? Polyp. What is the process of asexual reproduction in sponges? A sponge can break into fragments and each fragment can become an individual. What clade includes all animals that have true tissues and body symmetry? Eumetazoa. In cnidarians, what is a medusa? The free-swimming form that is umbrella-shaped with a mouth on the concave underside, surrounded by tentacles. Cnidarians exhibit the form of a polyp or a(n): medusa. In what capacities do nematocysts function (choose all that apply)? Defense, prey capture. The polyp form of cnidarians has a tubular body with a that is surrounded by. mouth; tentacles. The largest class of is Anthozoa. cnidarians. The mouth of a cnidarian polyp or medusa opens into a cavity. gastrovascular. Members of class Anthozoa include: Sea anemones, Sea pens. Which of the following are members of class Anthozoa? Sea anemones, Sea pansies, Sea fans, Stony corals. The unique stinging intracellular structures that assist a typical cnidarian in defense and prey capture are known as: Nematocysts. Stony corals, sea anemones, sea fans, sea whips, sea pansies, and sea pens are all members of the cnidarian class: Anthozoa. Cnidarians use in prey capture and defense. nematocysts. This group of animals is characterized by a transition to bilateral symmetry: Bilateria. Within phylum Cnidaria, the class that includes the most species is: Anthozoa. Members of class Anthozoa include: Sea anemones, Sea pansies, Sea fans, Stony corals. How many clades does the Bilateria comprise? Two. The mouth of an acoel flatworm leads to digestive : sac. The class that includes sea pens, sea daisies, corals, and many others is: Anthozoa. The unique stinging intracellular structures that assist a typical cnidarian in defense and prey capture are known as: Nematocysts. Cnidarians exhibit the form of a polyp or a(n): medusa. In what capacities do nematocysts function (choose all that apply)? Defense, prey capture. The polyp form of cnidarians has a tubular body with a that is surrounded by. mouth; tentacles. Some individuals in the cnidarian class have a sting that is toxic enough to kill humans: Cubozoa. The form of cnidarians is free-swimming and umbrella-shaped, with a mouth on the concave underside that is surrounded by : tentacles. Members of class Anthozoa include: Sea anemones, Sea pansies, Sea fans, Stony corals. Cnidarians use in prey capture and defense: nematocysts. This group of animals is characterized by a transition to bilateral symmetry: Bilateria. The class that includes sea pens, sea daisies, corals, and many others is: Anthozoa. The unique stinging intracellular structures that assist a typical cnidarian in defense and prey capture are known as: Nematocysts. Cnidarians exhibit the form of a polyp or a(n): medusa. In what capacities do nematocysts function (choose all that apply)? Defense, prey capture. The polyp form of cnidarians has a tubular body with a that is surrounded by. mouth; tentacles. Some individuals in the cnidarian class have a sting that is toxic enough to kill humans: Cubozoa. The form of cnidarians is free-swimming and umbrella-shaped, with a mouth on the concave underside that is surrounded by : tentacles.