Plant Physiology(Life Sciences ) Questions and Answers

Question 1. Cohesion of water molecules is due to___________
  1.    Diffusion
  2.    Osmosis
  3.    Gravitational force
  4.    Surface tension
Explanation:-
Answer: Option D. -> Surface tension
Answer: (d).Surface tension
Question 2. Which of the following is NOT the property of water?
  1.    Nonpolar molecule
  2.    Excellent solvent
  3.    High heat of vaporization
  4.    High specific heat
Explanation:-
Answer: Option A. -> Nonpolar molecule
Answer: (a).Nonpolar molecule
Question 3. Name the term which is given for the movement of water through a semipermeable membrane?
  1.    Diffusion
  2.    Osmosis
  3.    Tonicity
  4.    Transpiration
Explanation:-
Answer: Option B. -> Osmosis
Answer: (b).Osmosis
Question 4. The pressure which exerts outward from the cell wall is known as turgor pressure?
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option A. -> True
Answer: (a).True
Question 5. What is the measure of the osmotic pressure gradient of solutions separated by a semipermeable membrane?
  1.    Water potential
  2.    Ficks law
  3.    Turgor pressure
  4.    Tonicity
Explanation:-
Answer: Option D. -> Tonicity
Answer: (d).Tonicity
Question 6. Which of the following is NOT a Nastic movement?
  1.    Photonasty
  2.    Theremonasty
  3.    Seismonasty
  4.    Phytonasty
Explanation:-
Answer: Option D. -> Phytonasty
Answer: (d).Phytonasty
Question 7. Name the term which is given to the plants that grow at right angles to the direction of gravity.
  1.    Diagravitropic
  2.    Positive gravitropism
  3.    Negaitve gravitropism
  4.    Plagiogravitropic
Explanation:-
Answer: Option A. -> Diagravitropic
Answer: (a).Diagravitropic
Question 8. Which of the following controls the distribution of auxin in the roots?
  1.    LEAFY
  2.    IAA
  3.    PIN
  4.    AP2
Explanation:-
Answer: Option C. -> PIN
Answer: (c).PIN
Question 9. Name the term which defines the plant movement by touch?
  1.    Seismonasty
  2.    Thigmonasty
  3.    Nyctinasty
  4.    Photonasty
Explanation:-
Answer: Option B. -> Thigmonasty
Answer: (b).Thigmonasty
Question 10. Name the movement of the plant in response to a magnetic field?
  1.    Geotaxis
  2.    Magnetotaxis
  3.    Phototaxis
  4.    Rheotaxis
Explanation:-
Answer: Option B. -> Magnetotaxis
Answer: (b).Magnetotaxis
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