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

What products of light reactions of photosynthesis are used in the Calvin cycle?

One way to generate acetyl-CoA is to convert pyruvate into acetyl-CoA by stripping off a CO 2 molecule. The removal of CO 2 is referred to as what type of reaction?

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