8. As you breathe in, what happens to your diaphragm?
a. contracts and flattens
c. relaxes and rises
b. contracts and rises
d. relaxes and flattens
9. The two branching tubes that connect the trachea to the lungs.
a.Bronchi
b. Pharynx
c. Bronchioles
d. Trachea
10. The protective layer enclosing the fluid-filled surrounding of the lungs
a. alveoli
b. larynx
c. bronchioles
d. pleural membrane
11. Which of the following substances is the ongin of oxygen released as gas by green plants during photosynthesis?
a.Water
b. sugar
c. carbon dioxide
d. ribulose-1,5-biphosphate
12. Which of the following gases is important in photosynthesis?
a.Ozone gas
b. water vapour
c. oxygen
d. carbon dioxide
13. In which of the following cell organelles does photosynthesis occur?
a. Ribosome
b. chlorophyll
c. chloroplast
d. mitochondrion 14. Which of the following is/are the products of the light dependent reaction?
a. ADP only
b. NADPH only
c. ATP only
d. NADPH and ATP
15.Which of the following enables plant to trap energy from the sun?
a. epidermis
b.chloroplast
c.cuticle
d. chlorophyll​