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Botany
1.
Potato, ginger and turmeric are not roots but portions of the stem.
This is due to the fact that
- A.They have storage food materials
- B.They possess nodes, internodes and scaly and foliage leaves
- C.They have suberin, cutin and lignin
- D.They have xylem and phloem
- Answer
- Report
Answer : [A]
2.
Green plants evolve oxygen during the day rather than carbon-dioxide. This means that
- A.Green plants respire only at night
- B.Green plants do not respire
- C.Green plants respire during day but rate of respiration is very low
- D.The rate of photosynthesis is much higher than the rate of respiration
- Answer
- Report
Answer : [D]
3.
Chlorella is a suitable plant for an astronaut in space travel because ?
- A.It provides oxygen to the astronaut and carbon dioxide released is utilised for his/her food manufacture
- B.It supplies abundant food to the astronaut
- C.It is a single-celled autotrophic plant
- D.Its growth is quite rapid during space flight
- Answer
- Report
Answer : [A]
4.
Which one of the following crops can enrich soil with nitrogenous compounds ?
- A.Mustard
- C.Sugarcane
- B.Rice
- D.Black gram
- Answer
- Report
Answer : [D]
5.
Which one of the following plants does bear no fruits but produces seeds ?
- A.Groundnut
- C.Cycas
- B.Sugarcane
- D.Almond
- Answer
- Report
Answer : [C]
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