InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 601. |
Hormone that promotes growth of lateral buds and has nagative effect on apical dominance isA. Cytokinin B. Gibberellin C. Auxin D. Both B and C |
|
Answer» Correct Answer - A Hormone that promotes growth of lateral buds/has negative effect on apical dominance is cytokinin |
|
| 602. |
The hormone responsible for apical dominance is A. IAAB. GAC. ABAD. fiorigen |
|
Answer» Correct Answer - A Apical dominance is the phenomenon in which the presence of apical bud does not allow the nearby lateral buds to grow. This is characteristically caused by high auxin concentration |
|
| 603. |
The hormone responsible for apical dominance is A. I A AB. GAC. ABAD. florigen |
|
Answer» Correct Answer - A Auxins are mainly responsible for apical dominance. I A A is a natural auxin. |
|
| 604. |
Fill in the blanks 1. . In ....a.... growth, both the progeny cells following 19 mitotic cell division retain the ability to divide and continue to do so. 2.In ......b growth, following mitotic cell division, only one daughter cell continues to divide while the other differentiates and matures. 3.Anthmetlc growth is mathemancally expressed as ….c... 4.The exponential growth can be expressed as….d…A. a-arithmetic, b-geometric, c=`W_(1)=W_(0)e^(rt)`,d-`L_(t)=L_(0)+rt`B. a-arithmetic, b-geometric, d=`W_(1)=W_(0)e^(rt)`,c-`L_(t)=L_(0)+rt`C. b-arithmetic, a-geometric, c=`W_(1)=W_(0)e^(rt)`,d-`L_(t)=L_(0)+rt`D. b-arithmetic, c-geometric, d=`W_(1)=W_(0)e^(rt)`,d-`L_(t)=L_(0)+rt` |
|
Answer» Correct Answer - D a. In geometric growth, both the progeny cells following mitotic cell division retain the ability to divide Stationary phase and continue to do so. b. In arithmetic growth, following mitotic cell division, only one daughter cell continues to divide while the other differentiates and matures (c ) Arithmetic growth is mathematically expressed as `L_(t)=L_(0)+rt` d. The exponential growth can be expressed as `W_(1)=W_(o)e^(rt)` |
|
| 605. |
The measure of the abillty of the plant to produce new plant material is referred to asA. Relative growth rateB. Absolute growth rateC. Efficiency indexD. Both A and C |
|
Answer» Correct Answer - C It is the measure of the ability of the plant to produce new plant material, referred to as efficiency index |
|
| 606. |
One hormone hastens maturity period in juvenile conifers, a second hormone control xylem differentiation , while the third increases the tolerance of plants to various stresses they are respectivelyA. Gibberellin, Auxin, CytokininB. Auxin, Gibberellins, CytokininC. Gibberellins, Auxin , ABAD. Auxin, Gibberellins, ABA |
|
Answer» Correct Answer - C |
|
| 607. |
Condition of suspended growth due to external environmental condition is calledA. DormancyB. RestC. QuiescenceD. All of these |
| Answer» Correct Answer - C | |
| 608. |
Which of the given event does not happen during seed germination?A. Emergency of radicleB. Increase in rate of respirationC. Hydrolysis of stored polysaccharides and proteinsD. Photosynthesis by cotyledons |
| Answer» Correct Answer - D | |
| 609. |
Which hormone is responsible for apical growthA. IAAB. ABAC. GAD. All of these |
| Answer» Correct Answer - A | |
| 610. |
Assertion: Growth, differentiation and development are very closely related events in the life of a plant. Reason: Development in plants (i.e, both growth and differentiation) is under the control of intrinsic and extrinsic facotrs.A. If both assertion and reason are true and the reason is the correct explanation of the assertion. B. If both assertion and reason are true but reason is not the correct explanation of the assertion. C. If assertion is true but reason is false.D. If both assertion and reason are false. |
|
Answer» Correct Answer - B Growth, differentiation and development are very closely related events in the life of a plant. Development in plants (i.e, both growth and differen tiation) is under the control of intrinsic and extrinsic |
|
| 611. |
Assertion : Development is the sum of growth and differentiation. Reason : Development in plants is under the control of extrinstic factors only.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
|
Answer» Correct Answer - c Growth, differentitation and development are closely related events in the life of a plant. Development is sum of growth and differentiation. Development in plants is under control of both intrinsic and extrinsic factors. |
|
| 612. |
Dormancy of speed is broken byA. Auxin and cytokininB. Gibberellins and ethyleneC. ETHylene and auxinD. Cyokinin and auxin |
|
Answer» Correct Answer - b (b) Aleurone lyered `alpha` amylase promotes breaking of seed fdormancy |
|
| 613. |
Seed dormancy in tomato seeds is due toA. Impermeable seed coatB. Immature embryoC. Presence of ferulic acid in pulpD. Abscisic acid in pulp |
| Answer» Correct Answer - C | |
| 614. |
Fruit ripening is promoted by the hormone thatA. Promotes thinning of fruits in cherry and walnutB. Induce parthenocarpy in tomatoC. Promotes flowering in LemnaD. Is derived from RNA |
| Answer» Correct Answer - A | |
| 615. |
Which plant hormone causes fruit ripening?A. IAAB. CytokininC. EthyleneD. GA |
| Answer» Correct Answer - C | |
| 616. |
_______ is a period when growth and development is temporarily stopped.A. DormancyB. AbscissionC. SenescenceD. Vernalisation |
| Answer» Correct Answer - A | |
| 617. |
Dormancy of seeds broken by ethylene whereas it is induce byA. Abscisic acidB. AuxinC. CytokininD. Gibberellic acid |
| Answer» Correct Answer - A | |
| 618. |
Match column I with column II and select the correct option from the codes given below. `{:(Column I,Column II),(A."Auxins",(i)"Breaking seed dormancy"),(B."Gibberellins",(ii)"Inducing fruit ripening"),(C."Cytokinins",(iii)"Formation of abscission layer"),(D."Ethylene",(iv)"Root initiation"),(,(v)"Chloroplast development in leaves"):}`A. A-(iv), B-(i), C-(v), D-(ii)B. A-(iv),B-(v),C-(iii),D-(ii)C. A-(i),B-(iii),C-(ii),D-(iv)D. A-(iii),B-(iv),C-(i),D-(v) |
| Answer» Correct Answer - A | |
| 619. |
Match column I with column II and select the correct option from the codes given below, `{:(Column I,Column II),(A."Auxin",(i)"Fruit ripening"),(B."Cytokinins",(ii)"Phototropism"),(C."Abscisic acid",(iii)"Antagonist to" GAs),(D."Ethylene",(iv)"Growth of lateral buds"):}`A. A-(iv),B-(ii),C-(iii),D-(i)B. A-(ii),B-(iv),C-(iii),D-(i)C. A-(ii),B-(iii),C_(iv),D-(i)D. A-(iii),B-(iv),C-(ii),D-(i) |
| Answer» Correct Answer - B | |
| 620. |
Both ethylene and ABA are responsible forA. Promoting the abscission of leaves and fruitsB. Inducing dormancy of seedsC. Stimulation of apical dominanceD. Ripening |
| Answer» Correct Answer - A | |
| 621. |
Explain how it is possible that a short day plant and a long day plant growing in the same location could flower on the same day of the year. |
| Answer» If a short day plant is artificially given long and uninterrupted dark period, it flowers even under long day conditions. Siminlarly, if a long day plant is artificially given long photoperiods, it flowers even under short day contitions. Thus, it is possible that a short day plant and a long day plant growing in the same locality are made to flower on the same day of the year by providing suitable photoperiodic conditions artificially. | |
| 622. |
Match the irems in Column -I with Column -II And choose the correct option A. `A-2,B-5,C-1,D-3,E-4`B. `A-2,B-3,C-4,D-5,E-1`C. `A-21,B-5,C-2,D-4,E-3`D. `A-5,B-4,C-3,D-2,E-1` |
| Answer» Correct Answer - a | |
| 623. |
The plant hormone which closses the stomata in stressful condition isA. CytokininB. GAC. AuxinD. ABA |
| Answer» Correct Answer - D | |
| 624. |
Chose the wrongly matched pair fromn the followingA. Auxins =' to grow'B. Gibberellins - Gibberella fujikuraiC. Abscissic acid - Flowering hormone sperm DnaD. Ethylene -Gas hormone |
| Answer» Correct Answer - d | |
| 625. |
Why do some plants belonging to halophytes and growing in marshy lands, face great difficulty in seed germination. ? How such plants solve this problem ? |
| Answer» Plant belonging to halophytes and growing in marshy lands face a great difficulty in seed germination due to presence of high concentration of salt in water. These plants solve this problem by vivipary. | |
| 626. |
If the growing plant is decapitated, thenA. Its growth stopsB. Leaves become yellow and fall downC. Axillary buds are inactivatedD. Axillary buds are activated |
| Answer» Correct Answer - D | |
| 627. |
In the extreme drought condition which of the following plant hormone is produced due to which stomata closesA. ABAB. I.A.AC. GiberellinD. Ascorbic acid |
| Answer» Correct Answer - a | |
| 628. |
Plants growing under prolonged water stress condition develop the phenomenon of leaf area adjustment which isA. Shortening of plastochronB. Reduction of leaf surface areaC. Shortening of internodal lengthD. Shedding of older leaves |
| Answer» Correct Answer - D | |
| 629. |
During drought, plants develop hormoneA. Indole acetic acid B. Naphthalene acetic acid C. Indole butyric acidD. Abscisic acid |
|
Answer» Correct Answer - D During drought, plants develop abscisic acid |
|
| 630. |
Go through the following statements (i) In geometr,ic growth, following mitotic cell division, only one daughter cell con- tinues to divide while the other differen- tiates and mature. (ii) The ability of plants to follow different pathways in response to environment or phases of life to to.rm different kinds of structures, is called plasticity. (iii) The mathematical expression for arith- metic growth is `Lt = L_0 + rt` while for geo- metric growth, it is `W_1=W_0=W_(0)e^(rt)` (iv) The form of growth wherein new cells are always being added to the plant body by the activity of the meristem, is called the open form of growth. Which of these are correct .A. (iii) & (iv)B. (ii), (iii) & (iv)C. (ii) & (iv)D. All are correct |
| Answer» Correct Answer - B | |
| 631. |
Vivipary occurs inA. RhizophoraB. GrassesC. BamboosD. Hydrophytes |
| Answer» Correct Answer - A | |
| 632. |
Which one of the following statements is not correct regarding· vivipary?A. Seeds germinate within the fruit while still attached to the mother plantB. It usually occurs under highly saline conditionsC. It occurs in the mangrove plantsD. It involves a dormancy period for the seed |
| Answer» Correct Answer - D | |
| 633. |
Cytokinins which have specific effect in cytokinesis are modified forms ofA. Cytosine B. Adenine C. Guanine D. Thiamine |
|
Answer» Correct Answer - B Cytokinins which have specific effect in cytokinesis are modified forms of adenine |
|
| 634. |
Which of the following harmones can replace vernalization or Genetic dwarfness can be overcome by treating withA. Auxin B. Cytokinin C. Gibberellins D. Ethylene |
|
Answer» Correct Answer - C Gibberellins can replace vernalisation |
|
| 635. |
Assertion : Dry seeds do not germinate Reason :Water is the most important external factor for seed germinationA. If both Assetion and Reason are true and the Reason is a correct explanation of the AssertionB. If both Assertion and Reason are true but Reason is not a correct explanation of the AssertionC. If Assertion is true but the Reason is falseD. If both Assertion and Reaon are false |
| Answer» Correct Answer - A | |
| 636. |
The shoot branching depends upon the development of axillary buds but many of the buds in axillary position never grow out due to theA. Inhibitory factor present in the axillary budB. Inhibitory factor present in the apical budC. Inhibition under genetic controlD. None of the above |
| Answer» Correct Answer - B | |
| 637. |
Write any two external factors which influence the development of a plant. |
| Answer» Light, temperature, oxygen, nutrients, water, `CO_(2)`. (any two) | |
| 638. |
The factors which influence growth areA. nutrientsB. water, oxygenC. light, temperatureD. all of these |
|
Answer» Correct Answer - D Growth involves syntheis of more protoplasm, cell division, cell enlargement and cell differentiation. It is, therefore, influenced by all those factors which influence, biosynthetic machinery such as availability of water, oxygen, optimum temperature optimum light, minerals, gravity etc. |
|
| 639. |
The given figure shows growth of two leaves over the period of one day. If `AG =` absolute growth and RGR= relative growth rate, then select the correct option. A. `{:(AG "for leaf" A,RGR "for leaf" A,AG "for leaf" B, RGr "for leaf" B ),(1%, 1, 2%, 2):}`B. `{:(AG "for leaf" A,RGR "for leaf" A,AG "for leaf" B, RGr "for leaf" B ),(100%, 5, 10%, 5):}`C. `{:(AG "for leaf" A,RGR "for leaf" A,AG "for leaf" B, RGr "for leaf" B ),(5, 100%, 5, 10%):}`D. `{:(AG "for leaf" A,RGR "for leaf" A,AG "for leaf" B, RGr "for leaf" B ),(5, 100%, 5, 100%):}` |
|
Answer» Correct Answer - C Absolu7te growth rate `(AGR)`: increase in total growth of two organs or organisms is measured and comparison of total growth per unit time is called absolute growth. Absolute growth rate is the total growth per unti time. Relative growth rate `(RGR)`: It is growth per unit time per unit initial growth. `RGR =("Growth in given time period")/("Measurement at start of time period")` AG of leat `A = 10 cm^(2) - 5 cm^(2) = 5 cm^(2)` RGR for leaf `A = (5)/(5) xx 100 = 100%` AG for leaf `B = 55 cm^(2) - 50 cm^(2) = 5 cm^(2)` RGR for leaf `B = (5)/(50) xx 100 = 10%` Though the absolute growth is same for both the leaves (A and B), relative rate of growth is more in leaf A because of its initial small size. |
|
| 640. |
Write two essential factors which influence the rate of growth. |
| Answer» Water, Oxygen, Nutrients, Temperature, Light, Gravity. (any two) | |
| 641. |
Choose the correct or incorrect statement regarding given figure: (a) Figure (A) shows more relative growth rate as compare to figure (B). (b) Figure (A) and figure (B) shows the similar absolute growth rate. |
|
Answer» Correct Answer - (i) True (ii) True |
|
| 642. |
Which of the following is an example of plasticity? A. Heterophylly in cotton, coriander and larkspurB. Heterophylly in buttercupC. Bolting in beet and cabbage D. Both A and B |
|
Answer» Correct Answer - D Heterophylly in cotton, coriander, larkspur and but examples of plasticity |
|
| 643. |
Which formula is used to calculate the relative growth rate of plants? |
| Answer» Relative growth rate (RGR)= `(Growth per unit time)/(initial size)xx100` | |
| 644. |
In lag phase ,the growth isA. SlowestB. FastestC. IntermediteD. Nogowth at all |
|
Answer» Correct Answer - a (a) It represent intial stage of growth. The rate of growth is very slow in lag phase. |
|
| 645. |
What do you mean by lag phase? |
| Answer» This is the initial phase of growth when the rate of growth is very slow. | |
| 646. |
Assertion : 2,4-D is extensively used in agricultural and horticultural practies. Reason : 2,4-D is a herbicide.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
|
Answer» Correct Answer - a NA A (naphthalene acetic acid) and 2,4-D(2,4-dichlorophenoxyacetic acid) are synthetic auxins. All these auxins have been used extensively in agricultural and horicultural practies. They are widely used as herbicides. 2,4-D is widely used to kill dictoyledonous weeds, it does not affect mature monocotyledonous plants. It is used to prepare weed-free lawns by gardeners. |
|
| 647. |
The primary hormone causing abscission of leaves isA. IAA B. Ethylene C. ABA D. Cytokinin |
|
Answer» Correct Answer - C The primary hormone causing abscission of leaves is ABA. |
|
| 648. |
Write the expression for arithmetic growth. |
| Answer» Correct Answer - `L=L_(0)+rt` | |
| 649. |
The -S- shaped growth curve and grand period of growth may change withA. Sudden fluctuation In light intensityB. change in temperatureC. Fluctuation in humidityD. it remains unaffected |
| Answer» Correct Answer - d | |
| 650. |
The point in S-shaped growth curve where growth is maximum is calledA. Inflexion pointB. Compensation pointC. Extinction pointD. Deflection point |
| Answer» Correct Answer - C | |