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- Question
O2 released in the process of photosynthesis comes from
Options- A. CO2
- B. water
- C. sugar
- D. pyruvic acid
- Correct Answer
- water
- 1. Plants wilt due to excess of
Options- A. transpiration
- B. photosynthesis
- C. absorption
- D. None of these Discuss
- 2. Plants that grow in saline water are called
Options- A. halophytes
- B. hydrophytes
- C. mesophytes
- D. thallophytes Discuss
- 3. Monocot root differs from dicot root in having
Options- A. open vascular bundles
- B. scattered vascular bundles
- C. well developed pith
- D. radially arranged vascular bundles Discuss
- 4. Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?
Options- A. By cyanobacteria
- B. By electrical discharges in the atmosphere
- C. By industrially synthesised fertilizer
- D. By denitrification Discuss
- 5. Plants absorb most part of water needed by them through their
Options- A. embryonic zone
- B. growing point
- C. root hairs
- D. zone of elongation Discuss
- 6. Photo-oxidation is
Options- A. photorespiration
- B. photolysis
- C. light and oxygen induced breakdown
- D. All of the above Discuss
- 7. One of the following is not a function of bones.
Options- A. Place for muscle attachment
- B. Protection of vital organs
- C. Secretion of hormones for calcium regulation in blood and bones
- D. Production of blood corpuscles Discuss
- 8. Norepinephrine increases
Options- A. respiration
- B. urine production
- C. saliva production
- D. blood pressure Discuss
- 9. N2 content is kept constant in the biosphere due to
Options- A. N2 fixation
- B. industrial pollution
- C. nitrogen cycle
- D. absorption of N2 Discuss
- 10. Our major foods, fibres, spices, fruits and beverage crops are
Options- A. flowering plants
- B. gymnosperms plants
- C. pteridophytes
- D. bryophytes Discuss
Biology problems
Search Results
Correct Answer: transpiration
Correct Answer: halophytes
Correct Answer: well developed pith
Correct Answer: By denitrification
Correct Answer: root hairs
Correct Answer: All of the above
Correct Answer: Secretion of hormones for calcium regulation in blood and bones
Correct Answer: blood pressure
Correct Answer: nitrogen cycle
Correct Answer: flowering plants
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