Free MCQs & Online Quiz Practice for Exams

Q: Outer wall of guard cells is … (ETEA 2015)

A) Thin and elastic

B) Thick and elastic

C) Thin and non-elastic

D) Thick and non-elastic

Q: The critical day length of a short-day plant is: (ETEA 2015)

A) 11 hours

B) 15 hours

C) 11.5 hours

D) 15.5 hours

Q: All of the following are micronutrients except: (ETEA 2015)

A) Iron

B) Copper

C) Zinc

D) Magnesium

Q: Sunken stomata are found in the leaves of … (ETEA 2015)

A) Hydrophytes

B) Xerophytes

C) Mesophytes

D) All of the above

Q: A hormone that prevents senescence in leaves is: (ETEA 2015)

A) Abscisic acid

B) Cytokinins

C) Auxin

D) Gibberellins

Q: The following elements H, N, P and Mg are included in … (ETEA 2015)

A) Macronutrients

B) Micronutrients

C) Trace elements

D) Minor elements

Q: All of the following are micronutrients except: (ETEA 2016)

A) Iron

B) Chlorine

C) Copper

D) Potassium

Q: The guard cell of the stomata in monocot is: (ETEA 2016)

A) Kidney-shaped

B) Oval

C) Rounded

D) Dumbbell-shaped

Q: How much phosphorus is required by an adult man per day? (ETEA 2016)

A) 500 mg

B) 400 mg

C) 800 mg

D) 1800 mg

Q: The outer tissue of cambium develops into: (ETEA 2016)

A) Xylem

B) Phloem

C) Cortex

D) Epidermis

Q: The tissue present in angiosperms but absent in gymnosperms are: (ETEA 2016)

A) Vessels

B) Companion cells

C) Sieve tubes

D) Both a and b

Q: Transport of organic solutes from source to sink is: (ETEA 2016)

A) Transportation

B) Transduction

C) Translocation

D) Transformation

Q: Outer wall of guard cell is … (ETEA 2016)

A) Thick and elastic

B) Thick and non-elastic

C) Thin and elastic

D) Thin and non-elastic

Q: Auxin travels by diffusion towards: (ETEA 2016)

A) Shoot

B) Flower

C) Leaves

D) Base of plant

Q: Which nutrient is incorrectly paired with its function in plants? (ETEA 2017)

A) Iron–cytochromes & chlorophyll synthesis

B) Molybdenum–cell permeability

C) Cobalt–required by N₂ fixers

D) Calcium–formation of cell wall

Q: Which cells are responsible for movement of sugar as per mass-flow hypothesis? (ETEA 2017)

A) Tracheids & vessel elements

B) Tracheids & companion cells

C) Vessel elements & companion cells

D) Companion cells & sieve-tubes

Q: After buying green bananas or unripe avocados they can be kept in a brown bag to ripen. The trapped hormone is: (ETEA 2017)

A) Abscisic acid

B) Cytokinin

C) Ethylene

D) Gibberellic acid

Q: Macronutrients are: (ETEA 2017)

A) K Mg N P

B) Mn S P Cu

C) Cu Mg Mn S

D) Mg Mn Ca P

Q: Short life cycle is a plant adaptation to survive in: (ETEA 2018)

A) High temperature

B) Low temperature

C) High soil pH

D) Low soil pH

Q: The living phloem, cork and cork-cambium collectively are called: (ETEA 2018)

A) Periderm

B) Protoderm

C) Periblem

D) Bark