** the chordate phylogeny consists of invertebrate chordates (cephalochordates) and vertebrates. What are some vertebrate characteristics? Pharyngeal pouches, dorsal hollow nerve cord spinal cord, notochord, post-anal tail, – vertebrae and cranium (in all adults) What is the function of the dorsal nerve cord in vertebrates? It conducts electrical signals that control muscle movement What function does the vertebrae and cranium serve in vertebrates? Vertebrae protects the spinal cord and the cranium protects the Which of the following statements about pharyngeal pouches in chordates are correct? Invertebrate chordates don’t possess pharyngeal pouches at any life stage. Pharyngeal pouches are absent in most vertebrate embryos Gills in fishes develop from pharyngeal pouches possessed by their embryos All of the above Which of the following statements about the amniote egg are correct? Young emerging from an amniote egg tend to be smaller and at an earlier stage of their development than young emerging from a non-amniote egg Emergence of the amniote egg enabled reproduction to occur in dry, terrestrial habitats Animals with an amniote egg tend to invest less energy in parental care than vertebrates possessing a non-amniote egg All of the above From what is it believed that the first tetrapod vertebrate emerged? From a species of lobed-finned fish, as a result of mutations and natural selection. What is an amniotic egg? Where the embryo develops inside a protective cavity surrounded by amniotic fluid. Cavity is called the amnion.
** the chordate phylogeny consists of invertebrate chordates (cephalochordates) and vertebrates. What are some vertebrate characteristics? Pharyngeal pouches, dorsal hollow nerve cord – spinal cord, notochord, post-anal tail, vertebrae and cranium (in all adults) What is the function of the dorsal nerve cord in vertebrates? It conducts electrical signals that control muscle movement What function does the vertebrae and cranium serve in vertebrates? Vertebrae protects the spinal cord and the cranium protects the Which of the following statements about pharyngeal pouches in chordates are correct? Invertebrate chordates don’t possess pharyngeal pouches at any life stage. Pharyngeal pouches are absent in most vertebrate embryos Gills in fishes develop from pharyngeal pouches possessed by their embryos All of the above Which of the following statements about the amniote egg are correct? Young emerging from an amniote egg tend to be smaller and at an earlier stage of their development than young emerging from a non-amniote egg Emergence of the amniote egg enabled reproduction to occur in dry, terrestrial habitats Animals with an amniote egg tend to invest less energy in parental care than vertebrates possessing a non-amniote egg All of the above From what is it believed that the first tetrapod vertebrate emerged? From a species of lobed-finned fish, as a result of mutations and natural selection. What is an amniotic egg? Where the embryo develops inside a protective cavity surrounded by amniotic fluid. Cavity is called the amnion.
BIOL_211_Stewart_dridgway_10_2_KEY_.docx