Description : Most commonly used growth retardants are a. Phosphon b. MH c. Caumarin d. None of above
Last Answer : Phosphon
Description : Kaolin is — type antitranspirant a. Stomata closing b. film forming c. Reflecting type d. Growth retardants
Last Answer : c. Reflecting type
Description : Auxins have effective role in : a. Delay in flower opening b. Cell division c. Reduction of pre harvest fruit drop d. All of the above
Last Answer : Reduction of pre harvest fruit drop
Description : Colchicines bring about: (a) Polyploidy (b) Cell division (c) Cell elongation (d) Cell differentiation
Last Answer : Ans. ((a))
Description : Abscisic acid controls (a) cell division (b) leaf fall and dormancy (c) shoot elongation (d) cell elongation and wall formation.
Last Answer : b) leaf fall and dormancy
Description : ABA is involved in (a) shoot elongation (b) increased cell division (c) dormancy of seeds (d) root elongation.
Last Answer : (d) root elongation.
Description : Which one of the following pairs, is not correctly matched? (a) Gibberellic acid - Leaf fall (b) Cytokinin - Cell division (c) IAA - Cell wall elongation (d) Abscissic acid - Stomatal closure
Last Answer : (a) Gibberellic acid - Leaf fall
Description : Pruning in old fruit trees increases fruit bud formation by increasing ______: a. Carbohydrates b. New vegetative growth c. Hormonal contents d. Cell sap
Last Answer : New vegetative growth
Description : Rate of bud development is ___________ upto winter season : a. Slow b. Rapid c. Medium d. Constant
Last Answer : Rapid
Description : Callus is a term usually referring to: a. The tissue on the collar of a limb b. The first tissue develops on a cut surface just before the root formation iniates. c. Deformed growth on plant limbs d. A disease of plant leaves and limbs
Last Answer : The first tissue develops on a cut surface just before the root formation iniates
Description : In plants, __________ is the process of converting stored energy into energy for plant growth. a. Transpiration b. Photosynthesis c. Respiration d. Pollination
Last Answer : Respiration
Description : In temperate climates, pruning should not be done near the end of the summer because: a. New growth will not harden before winter b. It may increase foliage disease c. Plants will not recover in time to produce new growth before winter d. Sever “bleeding” from the cuts will kill the plant
Last Answer : New growth will not harden before winter
Description : Dormancy is a function of interaction of growth promoter like GA and growth inhibitor like _________: a. ABA b. Cycocell c. Alar d. Paclobutrazole
Last Answer : ABA
Description : Low temperature helps to _________ growth inhibitors: a. Increase b. Decrease c. Store d. Produce
Last Answer : Decrease
Description : Abscisic acid (ABA) is natural plant hormone, which: a. Promote the growth b. Initiate the ripening c. Induce the fruit maturity d. retards the growth
Last Answer : retards the growth
Description : Date growth does not cease if temperature does not fall below: a. 0°C. b. 10°C c. 18°C d. 20°C
Last Answer : 18°C
Description : Low temperature regime in summer which stops growth of mango is : a. 35°F b. 30°F c. 20°F d. 18°F
Last Answer : 18°F
Description : The amount of growth regulators present in naturally parthenocarpic fruits is: a. High b. Low c. Intermediate d. None of above
Last Answer : High
Description : Direction of plant growth is controlled by: a. Auxins b. Gibberellins c. Kinins d. All of above
Last Answer : Auxins
Description : Many _________ in super optimal concentrations also act as growth inhibitors : a. Auxins b. Gibberellins c. Cytokinins d. All of above
Description : New growth of plants need _________ water for proper development: a. Low b. Medium c. High d. Very High
Description : Nitrogen in vegetables is needed for a. Vegetative growth b. Ripening /maturity c. Reproductive growth d. None of these
Last Answer : Vegetative growth
Description : Failure of a viable pollen to grow down the style of the flower of the same variety is called ___________: a. Self sterility b. Self incompatibility c. Self unfruitfulness d. Sterility
Last Answer : Self incompatibility
Description : Through their effects on plant growth regulators, what do the temperature and light control in the plants? (a) Apical dominance (b) Flowering (c) Closure of stomata (d) Fruit elongation
Last Answer : (b) Flowering
Description : Injurious effects of sulphates can be replaced with the addition of ________: a. Nitrates b. Phosphates c. Ammonia d. Ca & Mg
Last Answer : Nitrates
Description : Elevation of temperate region from sea level ranges: a. 1000-2000 m b. 2500-3000 m c. 3500-4000 m d. b & c
Last Answer : b & c
Description : CRD is a statistical approach for: a. Field experiment b. Laboratory experiment c. a & b d. None
Last Answer : Laboratory experiment
Description : Major types of greenhouse are a. Even span b. Lean to c. Odd span d. a & b
Last Answer : a & b
Description : Button in citrus fruit is: a. Calyx at base b. Calyx at apex c. a & b d. All of above
Last Answer : Calyx at base
Description : Salt tolerant fruit plants are: a. Date and Ber b. Ber and Guava c. a & b d. None
Description : Almond and peach belongs to: a. Same genus and spp. b. Some germs & different spp. c. Different genus & different spp. d. All of above
Last Answer : Some germs & different spp
Description : Honey extracted from almond flower is inedible due to: a. Amygdalus factor b. Oxalic acid c. a & b d. None
Last Answer : Amygdalus factor
Description : Apple flower is distinguished from pear flower: a. Due to its colour b. Due to its size c. a & b d. None
Description : Best time of propagation of fruit plants in sub tropical region is : a. Spring season b. Spring & autum season c. Summer season d. Summer and winter season
Last Answer : Spring & autum season
Description : Lemons and limes can also be propagated by a. Layering b. Cuttings c. a & b d. None
Description : Dormancy in plant and seed is mainly due to a. Environmental factor b. Physiological factor c. a & b d. None
Description : Rest is a natural process in a. Seed b. Seed & plant c. Plant d. Tropical plant
Last Answer : Seed & plant
Description : Spur is defined as a. Mature productive wood b. Inmature juvenile wood c. a & b d. Mature wood with rosette head
Last Answer : Mature wood with rosette head
Description : Vegetables which grow during winter a. Cole crops b. Cucurbits c. Root crops d. a & c
Last Answer : a & c
Description : Parthenocarpic cucumber develops due to: a. After pollination b. Without pollination c. None of above d. a & b
Last Answer : Without pollination
Description : Most of the cucurbits are: a. Salt tolerant b. Salt sensitive c. a & b d. None
Last Answer : Salt tolerant
Description : Vegetables belonging to the cross pollinated group is a. Peas b. Tomato c. a & b d. Cabbage
Last Answer : Cabbage
Description : Sweet potato is propagated by: a. Stem cuttings b. Tubers c. Roots d. a & b
Description : Deep rooted vegetables require: a. Less frequent irrigation b. More water at each irrigation c. Both a & b d. None of above
Last Answer : Both a & b
Description : Researchers describe seed moisture contents in terms of : a. Dry weight b. Wet weight c. Percent weight d. a & b
Description : Tetrazolium test to check seed viability is a. Chemical test b. Enzyme test c. Germination test d. a & c
Description : Germination of undeveloped seeds is favored by: a. Warm temperature (>20°C) b. Gibberallic acid c. Low temperature (
Description : A sexual cell in plants is called a. Gamete b. Gametophyte c. Gamopetalous d. Gamosepalous
Last Answer : Gamete
Description : Chimera refers to a. Somatic cell fusion b. Gametic cell fusion c. Undiffereciated cell d. None
Last Answer : Somatic cell fusion
Description : How to make the lawn grow as slow as possible during the summer?
Last Answer : Not possible if you don't want to water the lawn. It depends on the precipitation, the weather and so on. Otherwise the lawn must be mowed.