Growing more then one crop in a season in the same land is called________________?

Gassypium arborium is__________________?

A. Tetraploid
B. Diploid
C. Triploid
D. Haploid

Gassypium hirsutum was developed from a cross between________________?A. G.arbarieum and G. rainmundii
B. G.arbarieum and G.thurberii
C. G.arbarieum and G.barbadense
D. G.arbarieum and G.herbaceum

 

The root of cotton plant goes up to depth of_________________?

A. 2-3 ft
B. 4-6 ft
C. 8-10 ft
D. non of these

Plants adopted to arid regions are___________________?

A. Mesophytes
B. Hydrophytes
C. Xerophytes
D. Aridic plants

The vegetation found on high altitude mountain is__________________?

A. Ale vegetation
B. Tundra vegetation
C. Conferous vegetation
D. None of the above

The heating of atmosphere by gases that are transparent to sun light but opaque to radiated heat is called________________?

A. Green house effect
B. Pollution
C. Warming
D. Solar radiation