Biology problems
- 1. Other than spreading malaria, anopheles mosquitoes are also vectors of
Options- A. dengue fever
- B. filariasis
- C. encephalitis
- D. yellow fever Discuss
Correct Answer: filariasis
- 2. 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
Correct Answer: root hairs
- 3. 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
Correct Answer: By denitrification
- 4. 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
Correct Answer: well developed pith
- 5. Plants that grow in saline water are called
Options- A. halophytes
- B. hydrophytes
- C. mesophytes
- D. thallophytes Discuss
Correct Answer: halophytes
- 6. Plants wilt due to excess of
Options- A. transpiration
- B. photosynthesis
- C. absorption
- D. None of these Discuss
Correct Answer: transpiration
- 7. O2 released in the process of photosynthesis comes from
Options- A. CO2
- B. water
- C. sugar
- D. pyruvic acid Discuss
Correct Answer: water
- 8. Photo-oxidation is
Options- A. photorespiration
- B. photolysis
- C. light and oxygen induced breakdown
- D. All of the above Discuss
Correct Answer: All of the above
- 9. 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
Correct Answer: Secretion of hormones for calcium regulation in blood and bones
- 10. Norepinephrine increases
Options- A. respiration
- B. urine production
- C. saliva production
- D. blood pressure Discuss
Correct Answer: blood pressure
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