#Question id: 11740
#Unit 6. System Physiology – Plant
Some given characteristics of the two types of sieve elements in seed plants such as Sieve tube elements and Sieve cells. Find out the true characteristics of sieve tube elements from the given statements;
i) Found in angiosperms
ii) Sieve plate pores are open channels
iii) Albuminous cells sometimes function as companion
cells
iv) P-protein is present in all eudicots and many
monocots
v) There are no sieve plates; all sieve areas are similar
#Question id: 11741
#Unit 6. System Physiology – Plant
phloem transport indicating the importance of long distance transport in plants, the experiments demonstrated that removal of a ring of bark around the trunk of a tree, which removes the phloem. What will be its effect?
#Question id: 11742
#Unit 6. System Physiology – Plant
Mature sieve elements external view, showing sieve plates. The pores in the sieve plates between the sieve tube elements are open channels, what is the relevance of this open pores in the sieve plates?
#Question id: 11743
#Unit 6. System Physiology – Plant
The wall between the two mature sieve tube elements contain a sieve plates, these sieve plate pores are open —that is, unobstructed by
#Question id: 11744
#Unit 6. System Physiology – Plant
Large pores in cell walls are the prominent feature of sieve elements, the sieve area pores range in diameter from
#Question id: 11745
#Unit 6. System Physiology – Plant
sieve cells of the sieve elements of phloem conduct sugars throughout the plant. The following statements given about characteistics of Sieve cells of sieve elements in seed plants;
a.) There is no P-protein in gymnosperms
b.) Angiosperm contains sieve plate pores are open channels
c.) Pores in sieve areas appear blocked with membranes in gymnosperms
d.) Companion cells are sources of ATP and perhaps other compounds
Which of the following combination is correct?