The smallest branches of the respiratory tree are the:a

pharynx.
b. tracheae.
c. bronchial tubes.
d. bronchioles.
e. bronchi.


D

Biology & Microbiology

You might also like to view...

Most E. coli antisense RNAs work with a protein called ________ to regulate their target mRNAs.

A. Hfq B. MicF C. CAP D. None of the choices are correct.

Biology & Microbiology

You isolate a cellular structure and determine that it is composed of ?-tubulin and ?-tubulin. Based on this evidence,

you correctly identify this structure as a(n): a. structural MAP. b. microfilament. c. microtubule. d. actin filament. e. myosin filament

Biology & Microbiology

A viroid is 

A. a small virus. B. a piece of RNA. C. a piece of protein. D. a cell that attacks viruses.

Biology & Microbiology

Which organelles supply energy (ATP) to plant cells?

A.) ribosomes B.) centrosomes C.) mitochondria D.) vacuoles

Biology & Microbiology