Which of these organisms is NOT in the clade Lophotrochozoa? Cephalopoda Gastropoda Bivalvia Platyhelminthes Myriapoda

Horseshoe crabs are in the subphylum Hexapoda O Crustacea Cheliceriformes OMyriapoda

To what subphylum does this animal belong? Chordata Vertebrata Agnatha Gnathostomata Elasmobranchii

animals in which of the following classes possess adductor muscles, labial palps, and use their gills for both respiration and feeding? -Bivalvia -Cephalopoda -Polyplacophora -Anthozoa -Gastropoda

Which of the following would NOTbe considered an organ of respiration for organisms in Phylum Chordata?    Gills Lungs Amnion Alveoli Skin

Order these groups in order of diversity : Phylum Porifera Phylum Cnidaria   Phylum Platyhelmenthes  Phylum Annelida Phylum Mollusca

Dr. Margert is developing a chemical product that reduces the accumulation of lipids in the brains of children with Niemann-pick type C1 disease. She assumes her product is pure based on the measurements of physical properties such as boiling point and melting point. Unfortunately, clinical studies have shown that, in some cases, her chemical results in severe seizures and migraines. Which of the following is the most likely explanation? O The product contains enantiomers which have similar physical properties but different chemical properties. O The product is pure, but it is affecting people differently based on their alleles. O The product contains contaminants of a different chemical compound O The product contains a mixture of cis and trans isomers which have the same physical properties but different chemical properties.

Which of the 4 characteristics of Phylum Chordata is visible on this organism?     Pharyngeal slits Dorsal hollow nerve cord Notochord Post-anal tail

What animal is this? nemertean polychaete tardigrade arrow worm phoronid

Aquatic molluscs have a blood vascular system & metanephridia so they must also possess an unpartitioned coelom secretion kidneys terminal cells a partitioned coelom       If a respiratory pigment such as hemoglobin or hemocyanin is not present in blood the blood would not carry carbon dioxide the blood would not carry oxygen the blood would have decreased oxygen carrying capacity