Birds are most closely related to:
a. reptiles.
b. testudines.
c. mammals.
d. labyrinthodonts.
e. terrapins.
a
You might also like to view...
Ciliates
A.move by pseudopods B. are not as varied as other protists C. have a gullet for food gathering D. do not divide by binary fusion E. are closely related to the radiolarians
According to the animation, what does oxygen get reduced to at the end of the electron transport chain?
a. ATP b. NADH c. Water d. Electrons e. Protons
Which of the following cutaneous receptors is mismatched with its function?
A. Krause end bulbs, fine touch B. Ruffini endings, pressure C. Pacinian corpuscles, fine touch D. free nerve endings, temperature E. Meissner corpuscles, fine touch
Why did the dinosaurs become extinct?
A. The pollen produced by the rise in flowering plants produced allergenic responses in dinosaurs and interfered with their ability to communicate with potential mates. B. Increasing carbon dioxide levels produced climates too hot for the incubation of their eggs. C. Cycads and other gymnosperms upon which herbivorous dinosaurs fed declined, and the dinosaurs were unable to digest the angiosperms that arose in their place. D. A meteorite or comet crashed into the Earth, causing smoke and ash that blocked the sun and caused death of the plants that were food for herbivorous dinosaurs. E. The changing climate caused the evolution of most dinosaur species into the existing bird, mammal, and reptile species that exist today.