From your textbook review questions. Which group of invertebrates is most closely related to vertebrates? cephalochordates echinoderms arthropods urochordates

From your textbook visual connections questions. The first organisms that oxygenated the atmosphere were cyanobacteria phototrophic organisms anaerobic organisms all of the above

From your textbook review questions. The large central opening in the parazoan body is called the: gemmule. spicule. ostia. osculum.

From your textbook review questions. Mesohyl contains: a polysaccharide gel and dead cells. a collagen-like gel and suspended cells for various functions. spicules composed of silica or calcium carbonate. multiple pores.

From your textbook review questions. Frogs belong to which order? Anura Urodela Caudata Apoda

From your textbook review questions. Neurons in the ________ control motor reflexes. thalamus spinal cord parietal lobe hippocampus

From your textbook review questions. While collecting specimens, a marine biologist finds a sessile Cnidarian. The medusas that bud from it swim by contracting a ring of muscle in their bells. To which class does this specimen belong? Class Hydrozoa Class Cubozoa Class Scyphozoa Class Anthozoa

From your textbook review questions. Cardiomyocytes are similar to skeletal muscle because: they beat involuntarily they are used for weight lifting they pulse rhythmically they are striated

From your textbook visual connections questions. Which of the following statements about the parts of an amniotic egg are false? The allantois stores nitrogenous waste and facilitates respiration. The chorion facilitates gas exchange. The yolk provides food for the growing embryo. The amniotic cavity is filled with albumen.

From your textbook review questions. Members of Chondrichthyes are thought to be descended from fishes that had ________. a cartilaginous skeleton a bony skeleton mucus glands slime glands