Biology MCQ Question and Answer
Biology MCQ Question and Answer
151. Night blindness is cause by lack of which vitamin?
- Vitamin A
- Vitamin B
- Vitamin C
- Vitamin D
152. Radioactivity is a phenomenon of the spontaneous emission of
- protons (alpha particles)
- electrons (beta particles)
- gamma rays (short wave electromagnetic waves)
- All of the above
153. Movements due to light are shown by
- flowering plants
- lower plants
- all land plants
- all the plants
154. Plants are killed in winter by frost
- because of desiccation and mechanical damage to the tissues
- because no photosynthesis takes place at such low temperature
- because respiration ceases at such low temperature
- because there is no transpiration
156. One of the following is most suitable for study of mutations
- Haploids
- Diploids
- Tetraploids
- Polyploid
157. Plants that grow under average temperature and moisture are called
- halophytes
- hydrophytes
- mesophytes
- xerophytes
159. Organic Substances which, in very small amounts, control growth and development called
- vitamins
- hormones
- enzymes
- None of the above