Plant - Growth & Development Test 4

Light, amount of oxygen and temperature are extrinsic factors responsible for the development of an organism but hormones are intrinsic factors.
So the correct option is 'Hormones.'

The final structure at maturity of a cell/tissue is also determined by the location of the cell within. For example, cells positioned away from root apical meristems differentiate as root-cap cells, while those pushed to the periphery mature as epidermis.

Senescence also known as aging refers to the decrease in the functional capacity of an organism. This results in a cellular breakdown followed by metabolic failure. The death of cells followed by the death of plant part is seen in senescence. Thus the correct answer is option A.

Plasticity is the ability of the plant to adjust to a particular environment by altering the rate of growth, development and metabolism. It allows the initiation of the cell division from any tissue of the plant, ability to regenerate the lost organs and undergo several developmental pathway for its survival. Hence option 'B' is correct answer.

Well the correct answer is 'D'. because as you kno... morew xylem is the principle water conducting complex tissue in higher plants . so the water present in the xylem cells will be surely under negative pressure and to just avoid collapsing of walls of xylem cells , lignin is present. liginin is also less hydrophillic then other polysacchrides like cellulose and hemicellulose hence prevents absorption of water by them and allow an efficient pathway for transport of water in xylem.