Biology MCQ Question and Answer
Biology MCQ Question and Answer
182. Rain water helps to increase the ____ to some extent.
- phosphorous contents
- nitrogen contents
- calcium contents
- potash contents
183. Plants absorb dissolved nitrates from soil and convert them into
- free nitrogen
- urea
- ammonia
- proteins
184. Poison glands of snakes are homologous to
- electric organs of fishes
- stings of rays
- sebaceous glands of mammals
- salivary glands of vertebrates
186. Most fish do not sink in water because of the presence of
swim bladder
air bladder
air sacs
air in spongy bones
swim bladder
air bladder
air sacs
air in spongy bones
- I and II are correct
- II and III are correct
- III and IV are correct
- I, II, III and IV are correct
188. Prokaryotic cells lack
- nucleolus
- nuclear membrane
- membrane bound by organelles
- All of these
189. Plants growing on sand are called as
- chasmophytes
- oxylophytes
- lithophytes
- psammophytes