MCQ on Plant Growth and Development. We covered all the MCQ on Plant Growth and Development in this post for free so that you can practice well for the exam.
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Plant Growth and Development MCQ for NEET Students
In which of the following plants, does the shape of leaves in juvenile plant and mature plant remains same?
(A) Coriander
(B) Larkspur
(C) Cotton
(D) Mango
Option d – Mango
In which of the following phase of growth, do cells attain their maximal size in terms of wall thickening and protoplasmic modifications?
(A) Elongation phase
(B) Meristematic phase
(C) Secretory phase
(D) Maturation phase
Option d – Maturation phase
Select the factor which influences the process of flowering in plants.
(A) Amount of chlorophyll
(B) Microbes present in the soil
(C) Acidity of soil
(D) Photoperiod
Option d – Photoperiod
Read the given statements and select the correct option. Statement I: Ethylene helps plants to increase their water absorption. Statement II: Ethylene promotes root growth and root hair formation.
(A) Statement I is correct, and Statement II is incorrect.
(B) Statement II is correct, and Statement I is incorrect.
(C) Both statements I and II are incorrect.
(D) Both statements I and II are correct.
Option d – Both statements I and II are correct.
Which of the following hormone is known as a stress hormone?
(A) Auxin
(B) Cytokinin
(C) ABA
(D) Ethylene
Option c – ABA
A group of PGR is involved in various growth-inhibiting activities such as dormancy and abscission. Which of the following hormone is included in this group?
(A) GA
(B) Cytokinin
(C) Ethylene
(D) Abscisic acid
Option d – Abscisic acid
Which of the following is true, if a plant is provided exposure to the light above its critical photoperiod?
(A) both short-day plants and long-day plants show no flowering.
(B) both short-day plants and long-day plants show flowering
(C) short-day plants show no flowering but long-day plants flowers.
(D) short-day plants show flowering but long-day plants do not flower.
Option c – short-day plants show no flowering but long-day plants flowers.
Vernalization is seen in all the plants given below, except
(A) Cabbage
(B) Carrot
(C) Sugarbeet
(D) China rose
Option d – China rose
What would be expected to happen if the growing plant is decapitated?
(A) The plant will die in a few hours
(B) Flowering will stop
(C) The plant will stop fruiting
(D) The plant will become bushier
Option d – The plant will become bushier
Select the INCORRECT pair (parameters used to measure growth- example) from the following.
(A) Maize root apical meristem – Increase in surface area
(B) Pollen tube – Increase in length
(C) Watermelon – Increase in size of the cell
(D) Dorsiventral leaf – Increase in surface area
Option a – Maize root apical meristem – Increase in surface area
The main function of cytokinin is
(A) to promote bolting
(B) induction of cell division and delay in senescence
(C) to cause dormancy
(D) to promote senescence
Option b – induction of cell division and delay in senescence
Select the INCORRECT statement about ethylene.
(A) It promotes root growth and root hair formation.
(B) It promotes bolting in plants with rosette habit.
(C) It promotes petiole elongation in rice plants.
(D) It synchronizes fruit sets in pineapples.
Option b – It promotes bolting in plants with rosette habit
……… liquid releases ethylene gas gradually, thus it is used for the artificial ripening of fruits.
(A) Propane
(B) Auxin
(C) Purine
(D) Ethephon
Option d – Ethephon
Following are the methods used to break seed dormancy, except
(A) Application of ABA
(B) Mechanical abrasion using knives
(C) Application of gibberellic acids
(D) Scratching of seed coats
Option a – Application of ABA
Select the INCORRECT pair from the following.
(A) Secondary xylem formation from interfascicular cambium- redifferentiation
(B) Tracheary elements lose protoplast and carry out water transportation differentiation
(C) Formation of interfascicular cambium from differentiated parenchyma cells redifferentiation
(D) Formation of a callus – dedifferentiation from parenchyma cells
Option c – Formation of interfascicular cambium from differentiated parenchyma cells redifferentiation
One phytohormone helps in promoting bolting in beet and cabbage, while the other is used to kill dicotyledonous weeds. These hormones are respectively
(A) IBA; 2,4-D
(B) ABA; GA3
(C) GA; 2,4-D
(D) NAA; IBA
Option c – GA; 2,4-D
‘It is the characteristic of living organisms growing in a natural environment. Identify the growth curve described in the given statement.
(A) Linear curve
(B) Sigmoid curve
(C) Parabolic curve
(D) Hyperbolic curve
Option b – Sigmoid curve
Select the INCORRECT statement with respect to the nature of cells at the root apex and shoot apex.
(A) These are constantly dividing cells.
(B) These cells represent a phase of elongation.
(C) These cells possess large conspicuous nuclei.
(D) These cells have thin, cellulosic walls with abundant plasmodesmata connections.
Option b – These cells represent a phase of elongation.
Which of the following will show the highest proportion of ethylene?
(A) Raw apples
(B) Fresh potato tubers
(C) Ripening banana
(D) Raw banana
Option c – Ripening banana
Which of the following statement is TRUE?
(A) Senescence means the degradation of a plant organ.
(B) The senescence of a plant organ is a stage of development before maturation.
(C) Senescence in plants leads to the death of cells.
(D) Both (A) and (C)
Option d – Both (A) and (C)
Influences of ethylene on plants do NOT include
(A) horizontal growth of seedlings.
(B) swelling of the axis of the seedling.
(C) inhibiting germination in peanut seeds.
(D) apical hook formation in dicot seedlings.
Option c – inhibiting germination in peanut seeds.
We covered all the MCQ on plant growth and development above in this post for free so that you can practice well for the exam.
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