Multiple Choice Questions 1- All animals are- a- Parasitic b- Saprophytic c- Autotrophic d- Heterotrophic 2-Which is the most important source of food and fodder ? a- Algae b- Fungi c- Lichen d- Cereal 3-Application of nitrogenous manure to a plant causes a- Vigorous vegetative growth b- early flowering c- Early fruiting d- Growth retardation due to toxicity of NHჳ 4-The element which is required in largest quantity by plants is a- Calcium b- Sulphur c- Phosphorus d- Nitrogen 5-Nodules with nitrogen-fixing bacteria are present in a- Cotton b- Wheat c- Gram d- Mustard 6-Plants can be made disease-resistant by a- Heat treatment b- Hormone treatment c- Colchicine treatment d- Breeding with their wild relatives 7-The process of cross breeding two different varieties...