-
question_answer1)
Sleep movements in Samanea saman are regulated by [APMEE 2002]
A)
N done
clear
B)
P done
clear
C)
K done
clear
D)
Mg done
clear
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question_answer2)
If the stem grows towards sunlight and root grows just opposite to it, the stem movement is called [AFMC 1980]
A)
Negative phototropic movement done
clear
B)
Phototropic movement done
clear
C)
Positive phototropic movement done
clear
D)
None of the above done
clear
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question_answer3)
Movements of leaves of sensitive plant, Mimosa pudica are due to [CBSE PMT 1988, 1999; CPMT 1989, 1991; AIIMS 1986; BHU 1997; CET Chd. 2002; Bihar PMT 2002; RPMT 1995, 2002; AFMC 1999; AMU 2002; MP PMT 2000]
A)
Thermonasty done
clear
B)
Seismonasty done
clear
C)
Hydrotropism done
clear
D)
Chemonasty done
clear
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question_answer4)
An apparatus commonly used to demonstrate phototropism is [CPMT 1984]
A)
Heliotropic chamber done
clear
B)
Clinostat done
clear
C)
Arc Auxanometer done
clear
D)
Potometer done
clear
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question_answer5)
Tertiary roots are [BHU 1979]
A)
Positively geotropic done
clear
B)
Negatively geotropic done
clear
C)
Plagiogeotropic done
clear
D)
Ageotropic done
clear
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question_answer6)
Protoplasmic streaming movements are referred as [DPMT 1985]
A)
Autonomic movements of locomotion done
clear
B)
Thigmonasty done
clear
C)
Photonasty done
clear
D)
Movements of curvature done
clear
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question_answer7)
The best material for demonstrating streaming movements of protoplasm within living cells is [CPMT 1985; BHU 1986]
A)
Staminal hairs of Tradescantia done
clear
B)
Onion peelings done
clear
C)
Pith cells done
clear
D)
None of the above done
clear
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question_answer8)
Movements of tentacles in Drosera are [RPMT 1984; AFMC 1997; JKCMEE 2002]
A)
Photonastic done
clear
B)
Thermonastic done
clear
C)
Thigmonastic done
clear
D)
Seismonastic done
clear
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question_answer9)
Negative phototropism occurs in [Tamil Nadu 2001]
A)
Root done
clear
B)
Stem done
clear
C)
Leaf done
clear
D)
Flower done
clear
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question_answer10)
Pneumatophores show [AMU 1989, 1999]
A)
Positive geotropism done
clear
B)
Negative geotropism (ageotropism) done
clear
C)
Thigmotropism done
clear
D)
Negative phototropism done
clear
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question_answer11)
Factors which can modify geotropic responses are [CPMT 1987]
A)
Root and shoot apices, temperature, light and atmospheric carbon dioxide done
clear
B)
Root and shoot apices, phytochrome, humidity and temperature done
clear
C)
Root and shoot apices, humidity and temperature done
clear
D)
None of the above done
clear
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question_answer12)
Nastic movements differ from tropic movements in being [AMU 1987]
A)
Movements of variation done
clear
B)
Nondirectional done
clear
C)
Directional done
clear
D)
Stimulated by chemicals. done
clear
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question_answer13)
Phototropism of stem and root are due to [MP PMT 1989]
A)
Differential hormonal effect done
clear
B)
Epinasty and hyponasty done
clear
C)
Effect of light done
clear
D)
Graviperception done
clear
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question_answer14)
Bending of stem towards light is [BHU 1988; AFMC 1990]
A)
Photoperiodism done
clear
B)
Heliotropism done
clear
C)
Photonasty done
clear
D)
Hydrotropism done
clear
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question_answer15)
A potted plant placed near the window bends outwardly due to [CPMT 1989]
A)
Greater oxygen availability to the tip done
clear
B)
More auxin content on the shaded side done
clear
C)
Greater light availability to tip done
clear
D)
Availability of necessary warmth to the tip done
clear
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question_answer16)
Jerky lateral leaflet movements of Desmodium gyrans are [CPMT 1991]
A)
Negative geotropic movements done
clear
B)
Positive geotropic movements done
clear
C)
Hydrotropic movements done
clear
D)
None of the above done
clear
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question_answer17)
Opening of flower and drooping of a bud are [CPMT 1991]
A)
Hyponasty done
clear
B)
Epinasty done
clear
C)
Curvature movement done
clear
D)
Spontaneous movements done
clear
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question_answer18)
Opening and closing of flowers represent a kind of [MP PMT 1991; CPMT 1993; APMEE 1999]
A)
Nastic movements done
clear
B)
Tropic movements done
clear
C)
Nutation movements done
clear
D)
Autonomic movements done
clear
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question_answer19)
Plant organs can detect a change in their orientation with respect of gravity [DPMT 1986]
A)
Within a few seconds done
clear
B)
Atleast a minimum of thirty minutes done
clear
C)
Atleast they have to be kept for a day done
clear
D)
Atleast they have to be kept for a weak done
clear
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question_answer20)
Phototropism in shoots is attributed to or phototropic movements are due to [MP PMT 1987; BHU 1979, 1981; AMU 1997; JKCMEE 2000; APMEE 1996]
A)
Auxin done
clear
B)
Gibberellins done
clear
C)
Cytokinin done
clear
D)
Abscisic acid done
clear
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question_answer21)
Thigmotropism is the response of the plant to [CPMT 1984]
A)
Gravity done
clear
B)
Water done
clear
C)
Light done
clear
D)
Contact done
clear
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question_answer22)
Positive geotropic response of root is [DPMT 1982]
A)
Always done
clear
B)
Rarely done
clear
C)
Mostly done
clear
D)
Nil done
clear
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question_answer23)
Both nyctinasty and thigmonasty are observed in [DPMT 1985]
A)
Drosera done
clear
B)
Mimosa done
clear
C)
Utricularia done
clear
D)
Cuscuta done
clear
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question_answer24)
On touching the leaves of Mimosa pudica droop down because of [CPMT 1991; RPMT 1995, 1996; BHU 1997; AFMC 1999; MP PMT 2000; AMU 2002; RPMT 2002]
A)
Seismonasty done
clear
B)
Hydrotropism done
clear
C)
Chemonasty done
clear
D)
Thigmotropism done
clear
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question_answer25)
Clinostat is connected with [BHU 1987]
A)
Thigmotropism done
clear
B)
Turgor changes done
clear
C)
Measurement of stomatal pores done
clear
D)
Geotropism done
clear
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question_answer26)
Indian Telegraph plant is [BHU 1986]
A)
Butea monosperma done
clear
B)
Crotalaria juncea done
clear
C)
Madhuca indica done
clear
D)
Desmodium gyrans done
clear
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question_answer27)
Tendrils exhibit/twining of tendrils is due to [BHU 1989; CBSE PMT 1991, 95; MP PMT 1992; CPMT 1993; CET Chd. 2000; AIIMS 2000]
A)
Thigmotropism done
clear
B)
Seismonasty done
clear
C)
Heliotropism done
clear
D)
Diageotropism done
clear
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question_answer28)
Phototropic and geotropic movements are linked to [CBSE PMT 1990; BHU 1999]
A)
Gibberellins done
clear
B)
Enzymes done
clear
C)
Auxin done
clear
D)
Cytokinins done
clear
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question_answer29)
Geotropic response of roots is due to [MP PMT 1992]
A)
Inhibition of stem growth done
clear
B)
More growth on lower side done
clear
C)
More growth on upper side done
clear
D)
Uniform growth done
clear
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question_answer30)
Movement of sperms towards archegonial necks due to component of their exudate is [CPMT 1992; RPMT 1998]
A)
Chemotropism done
clear
B)
Chemotaxis done
clear
C)
Phototaxis done
clear
D)
Hydrotropism done
clear
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question_answer31)
Tropic movement is due to [CPMT 1998]
A)
Cell elongation done
clear
B)
Cell division done
clear
C)
Both a and b done
clear
D)
Cell thickening done
clear
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question_answer32)
Clinostat is employed in the study of [CBSE PMT 1993]
A)
Osmosis done
clear
B)
Growth movements done
clear
C)
Photosynthesis done
clear
D)
Respiration done
clear
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question_answer33)
Closure of lid in Pitcher Plant is a [CBSE PMT 1995]
A)
Tropic movement done
clear
B)
Turgor movement done
clear
C)
Paratonic movement done
clear
D)
Autonomic movement done
clear
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question_answer34)
Movement of plant part in response to touch is [Orissa 1995; APMEE 1999]
A)
Seismonasty done
clear
B)
Thigmonasty done
clear
C)
Nutation done
clear
D)
None of the above done
clear
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question_answer35)
Some flowers (e.g., Oxalis) open in the morning and close during evening because of [RPMT 1996; AIIMS 1996; KCET 1998]
A)
Photonasty done
clear
B)
Phototropism done
clear
C)
Phototaxis done
clear
D)
Nyctinasty done
clear
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question_answer36)
The leaves of Mimosa pudica (Sensitive Plant) droop down on touch because [AIIMS 1984]
A)
Plants have nervous system done
clear
B)
The leaves are very tender done
clear
C)
The leaf tissues are injured done
clear
D)
The turgor pressure of leaf base changes done
clear
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question_answer37)
Bulliform cells in grass leaves show [AIIMS 1996]
A)
Growth movements done
clear
B)
Tropic movements done
clear
C)
Nastic movements done
clear
D)
Turgor movements done
clear
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question_answer38)
Example of positive geotropism is [Orissa 1997]
A)
Closing of flowers done
clear
B)
Upward growth of stem done
clear
C)
Downward growth of root done
clear
D)
Lateral growth of root done
clear
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question_answer39)
Thigmotropism is best exhibited by [AFMC 1998; RPMT 1998]
A)
Lamina done
clear
B)
Tendrils done
clear
C)
Root apex done
clear
D)
Thorns done
clear
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question_answer40)
Which movement occurs due to external stimulus [CPMT 1998]
A)
Tropic done
clear
B)
Nastic done
clear
C)
Tactic done
clear
D)
All the above done
clear
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question_answer41)
Plant movement in response to diffuse stimulus of light is [RPMT 1998]
A)
Phototropism done
clear
B)
Photolysis done
clear
C)
Phototaxis done
clear
D)
Photonasty done
clear
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question_answer42)
Movement of Sunflower towards the direction of Sun in [Haryana PMT 2000; Manipal 2001]
A)
Photonasty done
clear
B)
Phototropism done
clear
C)
Nyctinasty done
clear
D)
Seismonasty done
clear
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question_answer43)
Peristome teeth of moss shows [RPMT 2000]
A)
Hydrochasy done
clear
B)
Xerochasy done
clear
C)
Hydrotropism done
clear
D)
Chemotropism done
clear
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question_answer44)
Geotropic response is perceived by [CPMT 1999; DPMT 2001; Uttaranchal 2001]
A)
Mature roots done
clear
B)
Elongating cells done
clear
C)
Root cap done
clear
D)
Root hairs done
clear
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question_answer45)
The minimum time interval required between application of stimulus and production of response is
A)
Presentation time done
clear
B)
Relaxation time done
clear
C)
Conversion time done
clear
D)
Reaction time done
clear
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question_answer46)
The area of the plant which receives the stimulus is
A)
Perceptive region done
clear
B)
Responsive region done
clear
C)
Receptive region done
clear
D)
Reactive region done
clear
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question_answer47)
The minimum time for which the stimulus must be applied in order to obtain a response is
A)
Conversion time done
clear
B)
Conduction time done
clear
C)
Presentation time done
clear
D)
Reaction time done
clear
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question_answer48)
The area of photoperception is
A)
Region of elongation done
clear
B)
Tip done
clear
C)
Young leaves done
clear
D)
Axillary buds done
clear
View Solution play_arrow
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question_answer49)
Leaf of Mimosa droops down on touching because of [CPMT 1996; BHU 2000]
A)
Water loss from leaflet bases done
clear
B)
Changes in water concentration done
clear
C)
Loss of water from cells to intercellular spaces in pulvinus and pulvinules done
clear
D)
All the above done
clear
View Solution play_arrow
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question_answer50)
Opening of a flower and drooping of a bud are examples of [Kerala PMT 2004]
A)
Nyctinasty done
clear
B)
Hyponasty done
clear
C)
Seismonasty done
clear
D)
Moment of curvature done
clear
E)
Epinasty done
clear
View Solution play_arrow
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question_answer51)
Stimulus for flowering accepted by [MP PMT 2005]
A)
Young leaves done
clear
B)
Mature leaves done
clear
C)
Stem tissues done
clear
D)
None of the above done
clear
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question_answer52)
Shock movement in 'Touch me not' plant is [Orissa JEE 2005]
A)
Seismonasty done
clear
B)
Photonasty done
clear
C)
Chemonasty done
clear
D)
Thermonasty done
clear
View Solution play_arrow
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question_answer53)
Thigmotropism is best observed in [BHU 2005]
A)
Roots done
clear
B)
Leaves done
clear
C)
Tendrils done
clear
D)
Stems done
clear
View Solution play_arrow