Question

Name the following

1 the process used by all plants for tansport of gases.
2 the type of transport requiring energy
3 yellowing of leaves due to loss of chlorophyll
4 tissue which provides commercial fibres.
5 the dark outermost scaly region of log of wood

Answer 1

1 diffusion
2 starch and the process called ascent of sap
3 chlorophyll helps in absorbsion of sunglight and convert it to chemical energy so in absence it not take place.
4 perhaps xylem perenchyma
5 it is cell wall to protect it from outer stimulus