problem1) Answer all the problems:

i) describe the biotic factors which influences the life of plant.

ii) Provide a graphical presentation of serve.

iii) describe the characteristics of Halophytes in detail.

iv) Describe the causes of soil erosion.

v) prepare down the factors affecting populatgion growth.

problem2) Describe the various stages of Xerarch.

problem3) Enumerate the external and internal adaptations met within hydrophytes.

problem4) describe the sources of water pollution.