Description : Phototropic and geotropic movements are linked to (a) gibberellins (b) enzymes (c) auxin (d) cytokinins.
Last Answer : (c) auxin
Description : Phototropic movement is controlled by (1) Auxin (2) Gibberellin (3) Cytolthiin (4) Ethylene
Last Answer : (1) Auxin Explanation: Phototropism is the growth of organisms in response to light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from ... in quicker growth on the darker side and bending of the shoot toward the source of light.
Description : Phototropic movement is controlled by (1) Auxin (2) Gibberellin (3) Cytokinin (4) Ethylene
Last Answer : Auxin
Description : What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows? (a) Light stimulates plant cells on the lighted side to grow ... Green plants need light to perform photosynthesis. (d) Green plants seek light because they are phototropic.
Last Answer : (b) Auxin accumulates on the shaded side, stimulating greater cell elongation there
Description : Callus is induced to form roots in the medium of (a) Auxin (b) Cytokinins only (c) Morecytokinins than auxin (d) Moreauxin than cytokinins
Last Answer : (d) Moreauxin than cytokinins
Description : Which of the following statement is correct? (1) The causal organism for foolish seedling disease is the source of gibberellin (2) Abscisic acid is a growth promoter (3) The ratio of auxin : cytokinin control cell differentiation (4) Bolting of cabbage can be induced by treatment with IAA
Last Answer : Ans. ((d))
Description : Hormone used in tissue culture for better growth is: (1) Auxin (2) Gibberellin (3) Cytokinin (4) Vernalin
Description : Coconut milk is used in tissue culture in which present (a) cytokinin (b) auxin (c) gibberellin (d) ethylene.
Last Answer : (a) cytokinin
Description : Apical dominance is caused by (a) abscisic acid in lateral bud (b) cytokinin in leaf tip (c) gibberellin in lateral buds (d) auxin in shoot tip.
Last Answer : (d) auxin in shoot tip.
Description : The regulator which retards ageing/senescence of plant parts is (a) cytokinin (b) auxin (c) gibberellin (d) abscisic acid.
Description : Dwarfness can be controlled by treating the plant with (a) cytokinin (b) gibberellic acid (c) auxin (d) anti-gibberellin.
Last Answer : (b) gibberellic acid
Description : Differentiation of shoot is controlled by (a) high auxin : cytokinin ratio (b) high cytokinin : auxin ratio (c) high gibberellin : auxin ration (d) high gibberellin : cytokinin ratio.
Last Answer : (b) high cytokinin : auxin ratio
Description : Coconut milk factor is (a) an auxin (b) a gibberellin (c) abscisic acid (d) cytokinin
Last Answer : (d) cytokinin.
Description : Root development is promoted by (a) abscisic acid (b) auxin (c) gibberellin (d) ethylene
Last Answer : (d) ethylene.
Description : You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots? ... gibberellin (b) Auxin and cytokinin (c) Auxin and abscisic acid (d) Gibberellin and abscisic acid
Last Answer : (b) Auxin and cytokinin
Description : It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield? ... (b) Auxin and Ethylene (c) Gibberellin and Cytokinin (d) Gibberellin and Abscisic acid
Last Answer : (b) Auxin and Ethylene
Description : Which property of water is the result of an uneven distribution of electrons?
Last Answer : The polarity of water.
Description : Auxin can be bioassayed by (a) potometer (b) lettuce hypocotyl elongation (c) Avena coleoptile curvature (d) hydroponics.
Last Answer : (c) Avena coleoptile curvature
Description : Explain with examples the conditions responsible for uneven distribution pattern of the railway network in India. -SST 10th
Last Answer : The distribution pattern of the Railway network. . The northern plains with their vast level land, high population density and rich agricultural resources provided the most favourable condition for ... the Konkan railway along the west coast has facilitated the movement of passengers and goods.
Last Answer : The distribution pattern of the Railway network: (i) The northern plains with their vast level land, high population density and rich agricultural resources provided the most favourable condition for ... the Konkan railway along the west coast has facilitated the movement of passengers and goods.
Description : why there is uneven population distribution in nepal?
Last Answer : There is uneven distribution of Population in n Nepal. Thereasons behind it are as follows:# Due to diverse topography of land of land.# Due to the availability of different sorts of facilities ... federalism the development is not equalin all areas and# Due to the various pull and push factor.
Description : India has an endless growing season because (a) it experiences the monsoonal type of climate (b) the distribution of rainfall is uneven (c) temperatures throughout the year are favourable for growth of plants (d) its soil is very fertile the greater part being alluvial
Last Answer : Ans: (c)
Description : Uneven distribution of insolation on the earth is mainly due to the – (1) spherical shape of the earth (2) distribution of land and water (3) direction of the winds (4) presence of pressure belts
Last Answer : (1) spherical shape of the earth Explanation: Uneven distribution of insolation on the earth is mainly due to the Earth's tilted axis and the nearly spherical shape. The length of time that the ... lead to the unequal distribution of heat on the Earth, creating what is called a heat gradient.
Description : Pick out the wrong statement. (A) Packed towers are preferred for vacuum operation, because the pressure drop through the packing is less and they (packings) also lessen the ... of liquid, problem of channelling, loading & flooding is generally encountered in packed towers
Last Answer : (C) Diameter of randomly packed tower is normally more than 1.2 metres
Description : Certain characteristic demographic features of developing countries are (a) high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution (b) high ... (d) high mortality, high density, uneven population growth and a very old age distribution.
Last Answer : (a) high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution
Description : Need for irrigation is on account of, A. Seasonal Rainfall. B. Uneven distribution of rainfall. C. Different water needs of crops. D. All the above.
Last Answer : D. All the above.
Description : Which of the following are pertinent to the realization of hydrological cycle? 1. Latitudinal difference in solar heating of the Earth's surface 2. Inclination of the Earth's axis 3. Uneven distribution of land and water 4. Coriolis effect (a) ... (b) 1, 2 & 4 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4
Last Answer : (b) 1, 2 & 4 only
Description : Uneven distribution of insolation on the earth is mainly due to the (1) spherical shape of the earth (2) distribution of land and water (3) direction of the winds (4) presence of pressure belts
Last Answer : spherical shape of the earth
Description : Which of the following statements is correct? (A) Uniformity coefficient represents the shape of the particle size distribution curve. (B) For a well graded soil, both uniformity coefficient and coefficient of ... if it has most of the particles of about the same size (D) None of the above
Last Answer : Answer: Option D
Description : When the value of k increases, the effective result is ______ of the equivalent curvatures. A. downward curvatures B. flattening C. bulging D. sharp curvature
Last Answer : B. flattening
Description : What is meant by phototropic motion ?
Last Answer : : Phototropic movement is a type of curvature of plants. The movement of the stems and branches of the plant is always towards the light and the movement of the roots is always against ... motion and the movement in the opposite direction of the original light is called negative phototropic motion.
Description : What is Phototropic ?
Description : How many types of phototropic movements ?
Last Answer : 2 types of phototropic movement
Description : Phototropic movement is controlled by
Description : Stern is usually - (1) Positively Phototropic (2) Negatively Phototropic (3) Negatively geotropic (4) Positively acrotropic
Last Answer : (1) Positively Phototropic Explanation: Tropism is a growth movement whose direction is determined by the direction from which the stimulus strikes the plant. Most stems are positively phototropic, while most roots are said to be negatively phototropic.
Description : The locomotion of insects to the source of light is called : (1) Phototropic (2) Hydrotropic (3) Phototactic (4) Thermotactic
Last Answer : (1) Phototropic Explanation: The growth or movement of a plant part in response to a source of light is called phototropism. It is most often observed in plants, but can also occur in other organisms such as fungi.
Description : Name the plant organs that grow positively geotropic and positively phototropic manner.
Last Answer : Ans: Roots grow positively geotropically and Stem grows positively phototropically.
Description : Stem is usually (1) Positively Phototropic (2) Negatively Phototropic (3) Negatively geotropic (4) Positively acrotropic
Last Answer : Positively Phototropic
Last Answer : Phototropic
Description : Who discovered cytokinins? -Biology
Last Answer : answer:
Description : Commercial applications of cytokinins -Biology
Description : Which of the following statements are true? 1. Cytokinins promote stomatal opening 2. Sprays of indole -3 acetic acid can inhibit premature fruit fall 3. The growth movements caused by a unilateral stimulus are known as nastic movements 4. The ... 4 (b) 2 and 4 (c) 1, 2, and 4 (d) 1, 2, 3, and 4
Last Answer : Ans:(a)
Description : Many _________ in super optimal concentrations also act as growth inhibitors : a. Auxins b. Gibberellins c. Cytokinins d. All of above
Last Answer : Auxins
Description : Plants, protein, RNA, DNA contents are increased by a. Auxins b. Adenine c. Cytokinins d. None of above
Last Answer : Cytokinins
Description : Hormones which control apical dominance are: a. Auxins b. Cytokinins c. Gibberellins d. Polyamines
Description : Cut or excised leaves remain green for long if induced to root or dipped in (a) gibberellins (b) cytokinins (c) auxins (d) ethylene.
Last Answer : (b) cytokinins
Description : Leaf fall can be prevented with the help of (a) abscisic acid (b) auxins (c) florigen (d) cytokinins.
Last Answer : (d) cytokinins.
Description : Cytokinins (a) promote abscission (b) influence water movement (c) help retain chlorophyll (d) inhibit protoplasmic streaming.
Last Answer : (c) help retain chlorophyll
Description : A plant hormone used for inducing morphogenesis in plant tissue culture is (a) cytokinins (b) ethylene (c) abscisic acid (d) gibberellins.
Last Answer : (a) cytokinins
Description : Cell elongation in internodal regions of the green plants takes place due to (a) indole acetic acid (b) cytokinins (c) gibberellins (d) ethylene
Last Answer : (c) gibberellins