Mature phloem is a live tissue,whereas xylem is dead when mature.Explain why it is necessary for phloem to be alive to be functional,whereas xylem can function as dead tissue:
Explain why a plant needs to move food around,particularly from the leaves to other regions:
Explain what is meant by source to sink flow in phloem transport.
Two patrol boats M3 and M7 leave port at the same time.M3 heads due west and M7 on a bearing 227 degrees.After 30 minutes M7 has travelled 18 nautical miles and observes M3 in a direction due south.(a)How far is M3 from M7? (b) How far has M3 travelled?
A ship sails on a steady course bearing 106 degrees from A to B.If B is 76 nautical miles further east than A,find,to the nearest nautical mile,how far the ship has sailed?
After walking due west,turning and walking due south a man is 900 metres from his starting point and bearing 205 degrees from it.How far did he walk(a) westward?(b)southward?
Describe one benefit of the transpiration stream of a plant:
Describe two features of internal anatomy that distinguish monocot and dicot roots.
In angle ABC,angle A=angle B=32degree and AB=108 mm,find the perpendicular height from C to the baseAB.