Description : Which one of the following statements is not true? (a) Pollen grains of many species cause severe allergies. (b) Stored pollen in liquid nitrogen can be used in the crop breeding programmes. (c) Tapetum helps in the dehiscence of anther. (d) Exine of pollen grains is made up of sporopollenin.
Last Answer : (c) Tapetum helps in the dehiscence of anther.
Description : Exine layer of pollen grain is made up of : a) sporopollenin b)Pectin c) cellulose d)chitin
Last Answer : Ans: a)sporopollenin
Description : Function of cuticle in leaf? -Biology
Last Answer : answer:
Description : The cuticle is absent in - (1) Leaf (2) Stem (3) Root (4) Fruit
Last Answer : (1) Leaf Explanation: The epidermis of the stem and the leaf is usually surrounded by a thin, covering called cuticle. It is formed by a waxy substance called cutin. It is meant for preventing excessive evaporation of water. Cuticle is absent in the root epidermis.
Description : C4 plants are more efficient in photosynthesis than C3 plants due to (a) higher leaf area (b) presence of larger number of chloroplasts in the leaf cells (c) presence of thin cuticle (d) lower rate of photorespiration
Last Answer : d) lower rate of photorespiration.
Description : An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is (a) cuticle (b) sporopollenin (c) lignin (d) cellulose.
Last Answer : (b) sporopollenin
Description : 55. An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is (1) Cellulose (2) Cuticle (3) Sporopollenin (4) Lignin
Last Answer : Lignin
Description : An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme isa) Sporopolleninb) Ligninc) Cellulosed) Cuticle
Last Answer : a) Sporopollenin
Description : Abscission layer developed during leaf fall is made of: (a) Cork cells (b) Sclerenchymatous cells (c) Sclerenchymatous cells (d) Parenchymatous cells
Last Answer : Ans. ((d))
Description : A narrow layer of thin walled cells found between phloem/bark and wood of a dicot is (a) cork cambium (b) vascular cambium (c) endodermis (d) pericycle.
Last Answer : (b) vascular cambium
Description : In angiosperm, triple fusion is necessary for the formation of: (a) Embryo (b) Pollen (c) Endosperm (d) Leaf
Last Answer : Ans. ((c))
Description : n Pinus/gymnosperms, the haploid structure are (a) megaspore, endosperm and embryo (b) megaspore, pollen grain and endosperm (c) megaspore, integument and root (d) pollen grain, leaf and root.
Last Answer : (b) megaspore, pollen grain and endosperm
Description : Jute fibre is obtained from which part of the Jute? (a) Root (b) Stem (c) Leaf (d) Fruit
Last Answer : Ans: (b)
Description : Leaf curl resistant varieties
Last Answer : Ans. Pusa Jwala, Pusa Sadabahar, Pant C-1
Description : Plywood is made from (A) Common timber (B) Bamboo fibre (C) Teak wood only (D) Asbestos sheets
Last Answer : Answer: Option C
Description : Consider the following statements Fibre saturation point in wood is reached when 1. Free water is removed 2. Cell water is removed 3. Shrinkage of wood is rapid 4. Strength gain is rapid Which of these statements are correct? (a) 1, 2 and 3 (b) 1 and 2 only (c) 2 and 4 only (d) 1, 3 and 4
Last Answer : (d) 1, 3 and 4
Description : Cancer cells may become resistant to amethopterin by (A) Developing mechanisms to destroy amethopterin (B) Amplification of dihydrofolate reducatse gene (C) Mutation in the dihydrofolate reductase ... is no longer inhibited by amethopterin (D) Developing alternate pathway of thymidylate synthesis
Last Answer : Answer : B
Description : Bacteria become erythromycin resistant by the following mechanisms except: A. Becoming less permeable to erythromycin B. Elaborating an erythromycin esterase enzyme C. Elaborating a protection ... the erythromycin binding site D. Altering the ribosomal binding site through a methylase enzyme
Last Answer : C. Elaborating a ‘protection protein’ which blocks the erythromycin binding site
Description : Which of the following statements most closely describes the current status of angiotensin converting enzyme inhibitors in congestive heart failure: A. They are the first choice drugs unless contraindicated B. ... substitute for digitalis D. They are to be used as adjuncts only in resistant cases
Last Answer : D. They are to be used as adjuncts only in resistant cases
Description : Consider the following statements: 1. Propagation of a nerve impulse in a myelinated nerve fibre is different from that of unmyelinated fibre. 2. The impulse actually travels by leaping through the nodes of Ranvier in an unmyelinated fibre 3. ... incorrect? (a) 1, 2 (b) 1, 3, 4 (c) 2 only (d) 2, 3
Last Answer : Ans:(d)
Description : Consider the following statements: 1. When a nerve fibre is stimulated, a profound change is produced in the electrical properties of surface membrane and in steady potential. 2. Upon excitation, the resting potentialis suddenly changed. 3. It is due ... 1, 2, 3 (b) 2, 3 (c) 1, 2, 3, 4 (d) 1, 2, 4
Description : The following are true about an action potential in a nerve fibre: a. it occurs when its membrane potential is hyperpolarized b. it is associated with a transient increase in membrane ... permeability to potassium d. it has an amplitude which varies directly to the strength of stimulus
Last Answer : there is a decreased in membrane permeability to potassium
Description : The following action of digoxin is responsible for beneficial effect in auricular fibrillation: A. Increased myocardial contractility B. Suppression of SA node C. Depression of A-V conduction D. Enhanced Purkinje fibre automaticity
Last Answer : C. Depression of A-V conduction
Description : Dantrolene sodium reduces skeletal muscle tone by: A. Reducing acetylcholine release from motor nerve endings B. Suppressing spinal polysynaptic reflexes C. Inhibiting the generation of muscle action potential D. Reducing Ca2+ release from sarcoplasmic reticulum in the muscle fibre
Last Answer : D. Reducing Ca2+ release from sarcoplasmic reticulum in the muscle fibre
Description : The site of action of d-tubocurarine is: A. Spinal internuncial neurone B. Motor nerve ending C. Muscle end-plate D. Sodium channels in the muscle fibre
Last Answer : C. Muscle end-plate
Description : Which part of the body is covered by the body cuticle ?
Last Answer : The body is covered by the cuticle.
Description : What is cuticle ?
Last Answer : The exterior of plants, especially above and below the leaves, is covered with cutin. This covering is called cuticle.
Description : Match the following and mark the correct options `{:("Animal","Repiratory organ"),("Earthworm", (i). "Moist cuticle"), ("Aquatic Arthropods", (ii). "G
Last Answer : Match the following and mark the correct options `{:("Animal","Repiratory organ"),("Earthworm", (i). "Moist cuticle") ... -iv D. A-I,B-ii,C-i,v, D-iii
Description : In which part of alimentary canal of cockroach is invagination of cuticle found ?
Last Answer : In which part of alimentary canal of cockroach is invagination of cuticle found ? A. Anterior part ... part D. Both in antherior and posterior part
Description : Why should 2 cuticle nipper be used on the nails?
Last Answer : Feel Free to Answer
Description : How is the cuticle like a plastic bag?
Last Answer : Need answer
Description : What is cuticle in the leafs?
Last Answer : It is the waxy covering around the leaf that prevents waterloss.
Description : What is the cuticle around a nail called?
Last Answer : a cuticle
Description : What is the cuticle around a nail?
Description : Cuticle remover poisoning?
Last Answer : DefinitionCuticle remover is a liquid or cream used to remove excess tissue around the nails. Cuticle remover poisoning occurs when someone swallows this substance.This is for information ... drop in blood pressureSevere abdominal painSevere pain in the mouthSevere pain in the throatVomitingH
Description : Thick cuticle, sunken stomates are found in leaves of: (a) Hydrophytes (c) Mesophytes (b) Xerophytes (d) Epiphytes
Last Answer : Ans. ((b))
Description : The half-moon shaped, white area located at the base of a fingernail is called the A. basal layer B. cuticle C. lunula D. stratum
Last Answer : Ans: C
Description : Of which tissue nails, hoofs and horns are made of – (1) Cuticle (2) Chitin (3) Keratin (4) Tunicin
Last Answer : (3) Keratin Explanation: Keratin is a fibrous protein making up most cells found in our nails and hair and the epidermis layer of our skin. It also makes up fish scales and crustacean shells, bird feathers and beaks, and animal horns and hooves.
Description : Give reason: In aquatic plants like lotus, the cuticle is thick.
Last Answer : In aquatic plants like lotus, the cuticle prevents decaying of tissues of leaves and other parts.
Description : What is cuticle?
Last Answer : A waxy coating secreted by come plants is called cuticle.
Description : State the function of a) cuticle b) epidermis c) epidermis of roots
Last Answer : a) Cuticle: In terrestrial plants, it prevents water loss. In aquatic plants, it prevents decaying of tissues of leaves and other parts. b) Epidermis: It protects the inner tissues of plants. c) Epidermis of root: It absorbs water and nutrients from the soil.
Description : Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of (a) mesophytes (b) epiphytes (c) hydrophytes (d) xerophytes.
Last Answer : (c) hydrophytes
Description : The silkworm silk is the product of (a) salivary gland of the larva (b) salivary gland of the adult (c) cuticle of the larva (d) cuticle of the adult.
Last Answer : a) salivary gland of the larva
Description : Conifers are adapted to tolerate extreme environmental conditions because of (a) broad hardy leaves (b) superficial stomata (c) thick cuticle (d) presence of vessels.
Last Answer : (c) thick cuticle
Description : The final deposition of ameloblasts occurs in:** A. Primary enamel cuticle B. Secondary enamel cuticle C. Acquired enamel cuticle D. Cementum
Last Answer : A. Primary enamel cuticle
Description : Which of the following statements is true: A. Last secretion of odontoblast forms cementum B. Last secretion of odontoblast forms acquired enamel cuticle C. Remnants of ameloblasts form primary enamel cuticle D. Remnants of odontoblasts form primary enamel cuticle
Last Answer : C. Remnants of ameloblasts form primary enamel cuticle
Description : Which one of the following statement is correct, A. The remnants of Ameloblast contribute to the primary enamel cuticle B. the last secretion of the odontoblast is cementum X C. The ... ameloblast is the acquired of enamel cuticle D. The remnants of odontoblast form the primary enamel cuticle
Last Answer : A. The remnants of Ameloblast contribute to the primary enamel cuticle
Description : The gingiva of a child is diagnosed on the basis of all of these except of: A. Contour of gingival papilla B. Sulcus depth C. Contour of Nasmyth membrane (nasmyth description of the membrane is unclear that's why the term enamel cuticle is preferred D. Tight filling of gingival collar
Last Answer : C. Contour of Nasmyth membrane (nasmyth description of the membrane is unclear that's why the term enamel cuticle is preferred
Description : Using fluoride in the root surface caries is to protect, A. Enamel B. Dentine and cementum C. Cuticle
Last Answer : B. Dentine and cementum