MCQs Biology F.Sc. Part 2 ( 2nd Year )
Chapter No.16
Support and Movements
Total MCQs = 165
11. The xylem in the center of the tree that has stopped conducting water and minerals and is storing waste products from the plant is:
(A) Sap wood
(B) Heart wood
(C) Peripheral wood
(D) Both (B) and (C)
Answer:
(B) Heart wood
12. The portion of the xylem that is conducting water and minerals and hasn’t started storing waste products is:
(A) Sap wood
(B) Heart wood
(C) Central wood
(D) Both (A) and (C)
Answer:
(A) Sap wood
14. Lenticels are necessary for:
(A) Photosynthesis
(B) Gaseous exchange
(C) Water absorption
(D) AII options are comet
Answer:
(B) Gaseous exchange
15. Movement of Railway creeper around any rope is an example of:
(A) Nutation
(B) Turgor movement
(C) Tropic movement
(D) Seismonastic movement
Answer:
(A) Nutation
16. What is directional movement response that occurs in response to a directional stimulus is called?
(A) Nutation
(B) Tropism
(C) Both A and B
(D) Turgor movement
Answer:
(B) Tropism
17. Tropic movement in response to touch is known as:
(A) Geotropism
(B) Aerotropism
(C) Thigmotropism
(D) Both B and C
Answer:
(C) Thigmotropism
18. The growth of the pollen tube always towards the ovules, is due to:
(A) Geotropism
(B) Thigmotropisin
(C) Phototropism
(D) Chernotropism
Answer:
(D) Chernotropism
19. The movement of a plant in response to a touch or contact is:
(A) Nyctinastic
(B) Thetmonastic
(C) Haptonastic
(D) Hyponastic
Answer:
(C) Haptonastic
20. The flowers of Oxalis and Portulaca open in the day and close at night. It is called:
(A) Nyatinastic movement
(B) Thennonastic movement
(C) Haptonastic movement
(D) Thignionastic movement
Answer:
(A) Nyatinastic movement
