The diameter of bronchioles varies under the control of neurons, which cause the diameter to the diameter of bronchioles varies under the control of neurons, which cause the diameter to autonomic; constrict under parasympathetic control and dilate under sympathetic control autonomic; dilate under parasympathetic control and constrict under sympathetic control parasympathetic; either increase or decrease, depending upon the type of receptor present sympathetic; either increase or decrease, depending upon the type of receptor present

Explanation:

Bronchioles are distal airways found in the lungs made of layers of smooth muscles. They supply the alveolar with oxygen, therefore acting as the terminal part of the respiratory system. Bronchioles are approximately 1 mm in diameter or less

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation:

not sure but try c two haploid cells

explanation: