Soft-shelled turtles can remain submerged underwater for several hours without ventilating their lungs because ______.
A. they can use cutaneous respiration through the soft lining of their throats
B. the partial pressure of O2 is higher underwater
C. they can store some air in special air sacs under the shell
D. they also have rudimentary gills
A. they can use cutaneous respiration through the soft lining of their throats
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Answer the following statement true (T) or false (F)
At the cellular level, the development of an animal from a fertilized egg involves
a. cell division by meiosis. b. cell division by mitosis. c. cell division by differentiation d. cell division by morphogenesis. e. cell division by cloning.
What is the partial pressure of oxygen in a gas mixture that is 40% oxygen, 40% argon, and 20% helium, when the total pressure of the gas is 1000 mm Hg?
A) 333 mm Hg B) 600 mm Hg C) 400 mm Hg D) 100 mm Hg E) 200 mm Hg
All arboviruses involve
A. arthropod vectors. B. birds as the primary reservoir. C. congenital infection. D. diarrhea. E. All of the choices are correct.