Morphology and Adaptations in Higher Plants

31. Which of the following is a modification of stem used for vegetative reproduction?

a) Bulb

b) Rhizome

c) Stolon

d) Tendril

32. What is the purpose of the guard cells in leaves?

a) Water and mineral absorption

b) Gas exchange

c) Protection against pathogens

d) Storage of food

33. Which of the following is a modified leaf structure for protection?

a) Tendril

b) Succulent leaves

c) Spines

d) Thorns

34. What is the function of the xylem in plants?

a) Transport of sugars and other organic compounds

b) Transport of water and minerals

c) Storage of food

d) Protection against herbivores

35. Which of the following is a modification of stem for climbing and support?

a) Stolon

b) Bulb

c) Tendril

d) Rhizome