What is the proper sequence in the flow of air in mammals?
a. nasal cavities, larynx, pharynx, bronchi, trachea
b. nasal cavities, pharynx, bronchi, larynx, trachea
c. nasal cavities, pharynx, larynx, trachea, bronchi
d. nasal cavities, larynx, pharynx, trachea, bronchi
e. nasal cavities, bronchi, larynx, trachea, pharynx
c
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Ambient air, which contains 21% oxygen (O2) and a small amount (0.03%) of carbon dioxide (CO2), is the environmental condition that best suits which type of organism?
a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles
In what type of mating system is marked sexual dimorphism unlikely?
A. monogamy B. polygyny C. polygamy D. polyandry E. polygamy and polyandry
Which part of the lac operon is cis-dominant?
What will be an ideal response?
Proto-oncogenes can be converted to oncogenes by:
a. mutation. b. tumor suppressor genes. c. growth factors. d. transcription factors. e. infection by certain viruses.