Bio 230 Exam 3 Questions With Correct Answers 100%

Which of the following characterizes a deuterostome? {Ans: Anus develops first in the embryo}How do amphibians move air into their lungs? {Ans: pushing it down with their cheeks}Characters of Superphylum Deuterostomia {Ans: mouth 2nd, indeterminant development, radial cleavage}What is the postanal tail in humans? {Ans: coccyx}The varied shapes of bird beaks are directly related to what other adaptations? {Ans: Conversion of forelimbs to wings}In humans, a rare birth defect results in a single vessel emerging from the ventricles, much like the frog heart. This directly affects blood flowing through which of the following? {Ans: Pulmonary artery}class of Phylum Echniodermata {Ans: Asteroidea, ophulroidea, holothuroidea, echinoidera, crinoidera}What is the dorsal nerve cord in humans? {Ans: spinal cord}How many radial canals would you expect to find in this sea urchin? {Ans: 5}As fish- like amphibian ancestors began to swim and push along the bottom of streams and lakes, rather than swim suspended in the open water, which appendage would most likely be lost? {Ans: Anal Fin}During the paleontological dig, you find clear imprints of down feathers on an extinct crocodylian What does this imply? {Ans: Triceratops may have feathers}What is the endostyle