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 : Which of the following control the root initiation, cell elongation and apical dominance? (A)Auxins (B) ABA (C) Gibberellins (D) Ethylene
Last Answer : (D) Ethylene
Last Answer : (B) ABA
Description : Gibberellins promote (a) seed germination (b) seed dormancy (c) leaf fall (d) root elongation.
Last Answer : (c) leaf fall
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 : Which hormone breaks dormancy of potato tuber? (a) Gibberellin (b) IAA (c) ABA (d) Zeatin
Last Answer : (a) Gibberellin
Description : Colchicines bring about: (a) Polyploidy (b) Cell division (c) Cell elongation (d) Cell differentiation
Last Answer : Ans. ((a))
Description : Growth retardants are the substances which slow down : a. Cell division b. Cell elongation c. a & b d. None of the above
Last Answer : a & b
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 : Organisation of stem apex into corpus and tunica is determined mainly by (a) planes of cell division (b) regions of meristematic activity (c) rate of cell growth (d) rate of shoot tip growth.
Last Answer : (a) planes of cell division
Description : During propagation through cuttings, which hormone(s) is/are used for root promotion? a. ABA b. Seradix c. NAA d. All above
Last Answer : Seradix
Description : Plant hormone which causes dormancy in seeds and buds. -Biology
Last Answer : answer:
Description : Which helps in cutting the dormancy of seeds ?
Last Answer : Gibberellin helps to reduce seed dormancy.
Description : Scarification of seeds is done for removing (a) Dormancy (b) Germination inhibitors (c) Growth (d) Embryo
Last Answer : Ans:(a)
Description : Dormancy of seeds are broken by a. GA b. Ethylene c. Water d. None of above
Last Answer : GA
Description : Secondary dormancy in non dormant seeds is due to: j. Temperature a. Moisture b. Aeration c. Ligh
Last Answer : Temperature
Description : Why is vivipary an undesirable character for annual crop plants? (a) It reduces the vigour of the plant. (b) It adversely affects the fertility of the plant. (c) The seeds exhibit long dormancy. (d) The seeds cannot be stored under normal conditions for the next season
Last Answer : (d) The seeds cannot be stored under normal conditions for the next season
Description : Product of sexual reproduction generally generates (a) new genetic combination leading to variation (b) large biomass (c) longer viability of seeds (d) prolonged dormancy.
Last Answer : a) new genetic combination leading to variation
Description : Treatment of seeds at low temperature under moist conditions to break its dormancy is called (a) stratification (b) scarification (c) vernalization (d) chelation.
Last Answer : (c) vernalization
Description : .In protein synthesis, the polymerisation of amino acids involves three steps. Which one of the following is not involved in the polymerisation of protein ? (a) Termination (b) Initiation (c) Elongation (d) Transcription
Last Answer : (a) Termination
Description : In protein synthesis, the polymerisation of amino acids involves three steps. Which one of the following is not involved in the polymerisation of protein ? (a) Termination (b) Initiation (c) Elongation (d) Transcription
Last Answer : Transcription
Description : Which one of the following statements is correct? (a) In tomato, fruit is a capsule. (b) Seeds of orchids have oil-rich endosperm. (c) Placentation in primose is basal. (d) Flower of tulip is a modified shoot.
Last Answer : (d) Flower of tulip is a modified shoot.
Description : Plant hormones, which responses to wounds and stresses of biotic & abiotic origin & are also involved in dormancy & abscission, are-
Last Answer : Plant hormones, which responses to wounds and stresses of biotic & abiotic origin & are also involved in dormancy & abscission, are-
Description : In an all weld tensile test, the original specimen gauge length was 50mm, and after the test the increased gauge length was 65mm, what is the elongation percentage? a) % A is 40 b) % A is 60 c) % A is 30 d) % A is 36
Last Answer : c) % A is 30
Description : The length of a wire is increased by 1 mm on the application of a certain load. In a wire of the same material but of twice the length and half the radius, the same force will produce an elongation of (a) 0.5 mm (b) 2 mm (c) 4 mm (d) 8 mm
Last Answer : (d) 8 mm
Description : Structural characteristics of the cells in the elongation zone of the root. -Biology
Description : Plants absorb most of the water needed by them through their (a) Embryonic zone (b) Growing point (c) Root hairs (d) Zone of elongation
Last Answer : Ans:(c)
Description : Abscisic acid causes (a) stomatal closure (b) stem elongation (c) leaf expansion (d) root elongation.
Last Answer : (a) stomatal closure
Description : Root hair develop from the region of (a) elongation (b) root cap (c) meristematic activity (d) maturation.
Last Answer : (d) maturation.
Description : Root hairs develop from the region of : (1) Elongation (2) root cap (3) Meristematic activity (4) Maturation
Last Answer : (4) Maturation
Description : What dies first in girdling experiment - root or shoot. -Biology
Description : Which phase of growth is represented by root apex & shoot apex?
Last Answer : Which phase of growth is represented by root apex & shoot apex?
Description : Development of shoot and root is determined by: (a) Cytokinin and auxin ratio (b) Enzymes (c) Temperature (d) Plant nutrients
Description : In plants auxin are mainly present in: a. Root tips b. Stem end c. Shoot tips d. Leaf margins
Last Answer : Shoot tips
Description : The “eyes” of the potato tuber are (a) root buds (b) flower buds (c) shoot buds (d) axillary buds.
Last Answer : (d) axillary buds.
Description : Which of the following movement is not related to auxin level? (a) Bending of shoot towards light (b) Movement of root towards soil (c) Nyctinastic leaf movements (d) Movement of sunflower head tracking the sun
Last Answer : (c) Nyctinastic leaf movements
Description : In a ring girdled plant (a) the shoot and root die together (b) neither root nor shoot will die (c) the shoot dies first (d) the root dies first.
Last Answer : (d) the root dies first.
Description : In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues? (a) All parts (b) Stem and root (c) Flowers, fruits and leaves (d) Shoot tips and root tips
Last Answer : (d) Shoot tips and root tips
Description : Tunica corpus theory is connected with (a) root apex (b) root cap (c) shoot apex (d) secondary growth.
Last Answer : (c) shoot apex
Description : Bunchy top of Sugarcane is caused by a. Root borer b. Internode borer c. Top shoot borer d. None of these
Last Answer : c. Top shoot borer
Description : A systemic pesticide ? a). kills anything it touches b). root absorbed c). Root/shoot absorbed & translocative d). shoot absorbed
Last Answer : c). Root/shoot absorbed & translocative
Description : The mode of action of Isoproturon is a). Root inhibitor b). Shoot inhibitor c). Photosynthesis inhibition d). Amino acid inhibition
Last Answer : c). Photosynthesis inhibition
Description : The mode of action of dinitroanilines a). Shoot growth inhibitor b). Lipid inhibitor c). Root growth inhibitor d). Amino acid inhibitor
Last Answer : c). Root growth inhibitor
Description : What is the mode of action of diclofop a). Root inhibition b). Shoot inhibition c). lipid inhibition d). Photosynthesis inhibition
Last Answer : c). lipid inhibition
Description : Name the plant hormones which are involved in growth promoting activities such as cell division, cell enlargement, pattern formation, tropic growth, f
Last Answer : Name the plant hormones which are involved in growth promoting activities such as cell division, ... growth, flowering, fruiting and seed formation.
Description : Microtubule is involved in the (a) muscle contraction (b) membrane architecture (c) cell division (d) DNA recognition
Last Answer : (c) cell division