Biology 2nd Year
MCQs
Chapter No.2
Support and Movement

11. The scale, iatous cells which are found in seed coats & nut shells are

• Phototropism
• Thigmotropism
• Chemotropism
• Geotropism

12. The vas ibium lies between

• Epidermis
• Cortex
• Pith
• Xylem

13. Turgor pressure is generated mainly by osmotic pressure of Plant Movements

• Vascular cambium
• Cork cambium
• Vascular cambium & Cork cambium
• None of these

14. Which is not true for auxins?

• Vessels
• fibers
• sclereides
• trachieds

15. Nastic movements are due to balance between

• Primary and secondary xylem
• Cork and phloem
• Primary Phloem and Secondary Xylem
• Secondary Phloem and Secondary Xylem

16. Which one of following is non-directional plant movement?

• Cell cytosol
• Cell vacuoles
• Cell cytosol & Cell vacuoles
• None of these

17. Which is not true for pulvinus

• Positive gravitropism of roots
• Negative gravitropism of Stem
• It is for hyponasty
• Causes bending in Oxygen

18. The movement of part of plant in response to stimulus of light

• Auxins and cytokines
• Abscisic and auxins
• Gibberalin and abscisic
• Cytokines and gibberalin

19. The movement in response to some chemical is called

• Paratonic movements
• Tropic movements
• Nastic movements
• All of these

20. Opening and closing of flowers due to light intensity is termed

• Haptonasty
• Thermonasty
• Photonasty
• Phototropic