The conducting zone contains all of the following except
a. the primary bronchi
b. the larynx
c. the terminal bronchioles
d. alveolar sac

in 1972 the fluid—mosaic membrane model of membrane structure was proposed based on thermodynamic principals of organization of membrane lipids and proteins and available evidence of asymmetry and lateral mobility within the membrane matrix [s. j. singer and g. l. nicolson, science 175 (1972) 720–731].

that is wrong, its not thymus.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.

answer increasing the intensity, duration,and frequency of exercise progressively;