Author: Anonymous

Examination of the fossils of Archaeopteryx reveals that, in common with extant birds, it had A) a long tail containing vertebrae. B) feathers. C) teeth. D) Three of the options listed are correct. E) Two of the options listed are correct.  

Which structure of the amniotic egg most closely surrounds the embryo? A) the chorion B) the yolk sac C) the allantois D) the amnion

Mammals and birds eat more often than reptiles. Which of the following traits shared by mammals and birds best explains this habit? A) endothermy B) ectothermy C) amniotic egg D) terrestrial habitat  

All of the following belong to the lobe-fin clade, except A) chondrichthyans. B) Australian lungfishes. C) African lungfishes. D) coelacanths. E) tetrapods.  

Briefly define the following terms, concepts or rules using words, equations, and/or sketches: Ionic bond

How are primates different from all other mammals? A) placental embryonic development B) hairy bodies C) arboreal lifestyles D) ability to produce milk E) opposable thumbs in many species  

Tiktaalik lived in cold, artic tundra in rocks about 375 million years old.

What is a distinctive feature of the chondrichthyans? A) an amniotic egg B) unpaired fins C) an acute sense of vision that includes the ability to distinguish colors D) a cartilaginous endoskeleton E) lack of jaws

According to one hypothesis, the jaws of vertebrates were derived by the modification of A) scales of the lower lip. B) skeletal rods that had supported pharyngeal (gill) slits. C) one or more gill slits. D) one or more of the bones of the cranium. E) one or more of the vertebrae.  

Which of the following is a characteristic of all chordates at some point during their life cycle? A) jaws B) post-anal tail C) four-chambered heart D) vertebrae