NEET Parts of Plants MCQ Quiz Quiz Questions

1. Which of the following factors promotes the opening of the stomatal aperture?

A A decrease in guard cell turgidity B When the outer walls of the guard cells contracts C Radial orientation of the cellulose microfibrils in the cell wall of the guard cells D The longitudinal orientation of the cellulose microfibrils in the cell wall of guard cells

2. Which of the following is made of dead cells?

A Phloem B Phellem C Collenchyma D Xylem parenchyma

3. Which of the following statement are true about the Tyloses – the balloon-shaped structures?

A Characterise the sapwood B Original in the lumen of vessels C Are linked to the ascent sap through xylem vessels D Are extensions of the xylem parenchyma cells into vessels

4. Which of the following events takes place in a ring girdled plant?

A The eath of the root first B The death of the shoot first C The shoots and the root dies first D Neither the shoot nor the root will die

5. This is one of the most recent and valid explanations for stomatal movements

A Starch hydrolysis B Transpiration C Guard cell photosynthesis D Potassium efflux and the influx

6. Which of the following are the primary water-conducting elements of xylem in gymnosperms?

A Fibres B Vessels C Tracheids D Transfusion tissue

7. Which of the following is not a lateral meristem?

A Phellogen B Cork cambium C Intercalary meristem D Interfascicular cambium

8. In monocots, grafting is not possible as _________

A They show parallel venation B they have scattered vascular bundles C they lack cambium D they are herbaceous

9. Vascular bundles are closed in monocots as:

A presence of vascular cambium between xylem and phloem B presence of xylem and phloem C absence of vascular cambium D xylem and phloem occur in separate bundles

10. Difference between heartwood and sapwood is that heartwood

A shows the presence of fibres and rays B has dead and non-conducting elements C lacks parenchyma and vessels D is susceptible to pathogens and pests