Description : The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of (a) weak gravitational pull (b) transpiration pull (c) lignified thick walls (d) cohesion and adhesion
Last Answer : (d) cohesion and adhesion.
Description : Cohesion and adhesion in the ascent of xylem sap. -Biology
Last Answer : answer:
Description : What factors determine the ascent of xylem sap in a plant? -Biology
Description : Cohesion-tension theory of sap ascent -Biology
Description : By whom was the most accepted theory for ascent of sap was given? -Do You Know?
Description : Ascent of sap in plants takes place through – (1) Pith (2) Phloem (3) Cambium (4) Xylem
Last Answer : (4) Xylem Explanation: The ascent of sap in the xylem tissue of plants is the upward movement of water from the root to the crown. Xylem is a complex tissue consisting of living and ... cells in xylem are typically nonliving and include, in various groups of plants, vessels members and tracheids.
Description : The most widely accepted theory for ascent of sap in trees is (a) capillarity (b) role of atmospheric pressure (c) pulsating action of living cell (d) transpiration pull and cohesion theory of Dixon and Jolly.
Last Answer : (d) transpiration pull and cohesion theory of Dixon and Jolly.
Description : The balloon-shaped structures called tyloses (a) originate in the lumen of vessels (b) characterise the sapwood (c) are extensions of xylem parenchyma cells into vessels (d) are linked to the ascent of sap through xylem vessels.
Last Answer : (c) are extensions of xylem parenchyma cells into vessels
Description : Ascent of sap in plants takes place through (1) Pith (2) Phloem (3) Cambium (4) Xylem
Last Answer : Xylem
Description : From site of uptake to site of action, fluazi fop-butyl move in a). water conducting stream b). sap conducting stream c). Both d). None
Last Answer : c). Both
Description : Pick up the most favourable condition for the rapid growth of fungus for dry rot from the following: (A) Absence of sun light (B) Dampness (C) Presence of sap (D) All the above
Last Answer : Answer: Option D
Description : The desaturation and chain elongation system of polyunsaturated fatty acids are greatly diminished in the absence of (A) Insulin (B) Glycagon (C) Epinephrine (D) Thyroxine
Last Answer : Answer : A
Description : Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks. Consumers A D C Uptake Run off Soil solution B A B ... minerals Detritus (c) Detritus Rock minerals Producers Litter fall (d) Producers Litter fall Rock minerals Detritus
Last Answer : (c) Detritus Rock minerals Producers Litter fall
Description : A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap? (a) Acidic (b) Alkaline (c) Low refractive index (d) Absence of sugar
Last Answer : (b) Alkaline
Description : Insulin: a. is secreted as a pro-insulin b. increases protein synthesis c. is required for glucose uptake in all tissues d. is a steroid hormone
Last Answer : is secreted as a pro-insulin
Description : Which of the following represents the action of insulin? (a) Increases blood glucose level by stimulating glucagon production. (b) Decreases blood glucose levels by forming glycogen. (c) ... promoting cellular uptake of glucose. (d) Increases blood glucose levels by hydrolysis of glycogen.
Last Answer : (b) Decreases blood glucose levels by forming glycogen
Description : The following antidepressant increases rather than inhibits 5-HT uptake into neurones: A. Clomipramine B. Fluoxetine C. Tianeptine D. Trazodone
Last Answer : C. Tianeptine
Description : Which one of the following statements is not correct? (a) Offspring produced by the asexual reproduction are called clone. (b) Microscopic, motile, asexual reproductive structures are called zoospores. ( ... in the standing water, drains oxygen from water that leads to the death of fishes.
Last Answer : (c) In potato, banana and ginger, the plantlets arise from the internodes present in the modified stem.
Description : Epinephrine increases the concentration of free fatty acids in plasma by increasing (A) Extramitochondrial fatty acid synthesis (B) Mitochondrial fatty acid chain elongation (C) Microsomal fatty acid chain elongation (D) Lipolysis in adipose tissue
Last Answer : Answer : D
Description : In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases. (A) Percentage elongation (B) Brinell hardness (C) Tensile strength (D) All 'a', 'b' & 'c'
Last Answer : (A) Percentage elongation
Description : Difference between node and internodes? -Biology
Description : Deficiency appears as short internodes in plant.
Last Answer : Ans. N
Description : Which of the following plant organ/s have determinate growth? 1. Dicot leaves and internodes 2. Fruits 3. Grass leaves and internodes 4. Rhizomes and tubers Select the correct answer from the following: (a) 1 and 3 (b) 2 and 4 (c) 1, 2, and 4 (d) 1, 2, 3, and 4
Last Answer : Ans:(c)
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 : Ginger is a stem and not a root because (1) It stores food material (2) It grows horizontally in the soil (3) It has nodes and internodes (4) It lacks chlorophyll
Last Answer : (3) It has nodes and internodes Explanation: Ginger is a modified stem. A rhizome to be exact. A rhizome is a thick horizontally growing stem which usually stores food material. It has nodes ... elongation of the rhizome. Roots develop from the lower surface of the rhizome. Eg. Ginger, Turmeric.
Description : The parts of stem from which a leaf arises is called a. Node b. Internodes c. Apex d. Bud
Last Answer : Node
Description : The length of different internodes in a culm of sugarcane is variable because of (a) size of leaf lamina at the node below each internode (b) intercalary meristem (c) shoot apical meristem (d) position of axillary buds.
Last Answer : (b) intercalary meristem
Description : Which meristem is present at the base of the leaves or internodes on twigs? (a) Apical meristem (b) Cambium (c) Intercalary meristem (d) Epidermis
Last Answer : (c) Intercalary meristem
Last Answer : It has nodes and internodes
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 : Who'll help me celebrate Darwin's ascent to the 10k heights?
Last Answer : Congrats Darwin!
Description : A house has 6 stories, each the same height. How many times as long is the ascent to the sixth floor as the ascent to the third? -Riddles
Last Answer : 2 1/2 times (5/2, not 6/3).
Description : What causes cell juice ascent ?
Last Answer : Cell sap ascending occurs through vessels.
Description : What is the English version of cell ascent ?
Last Answer : English Ascent of sap.
Description : A flight is to depart from an airport with runway 09 and 27. Surface wind is 270/05; an inversion is reported at 300 feet with turbulence and wind shear. The wind just above the ... throttle during the passage through the inversion d. Depart runway 27 with as steep an ascent as possible
Last Answer : b. Depart on runway 09 with a tailwind
Description : When would the negative differential limits be reached/exceeded? a. Rapid descent when AC descends below cabin altitude b. During ground pressure testing c. Rapid ascent when aircraft climbs d. When changing to manual operation
Last Answer : a. Rapid descent when AC descends below cabin altitude
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 : 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 : Assertion `:-` Antidiuretic hormone, increases the water permeability of distal convoluted tubule. Reason `:-` In the absence of ADH, water re-absorpt
Last Answer : Assertion `:-` Antidiuretic hormone, increases the water permeability of distal convoluted tubule. Reason ... . If both Assertion & Reason are false.
Description : The absence of which of the following internal controls increases the opportunity for fraud? a. Appropriate segregation of duties or independent checks b. Job applicant screening for employees with access to ... access to assets d. The absence of any of the above increases the opportunity for fraud
Last Answer : The absence of any of the above increases the opportunity for fraud
Description : Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land? [CSAT 2011] (a) It greatly increases ... c) It raises the water table (d) It fills the air spaces in the soil with water
Last Answer : Ans: (b)
Description : Salinization occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land? a. It greatly increases the crop ... c. It raises the water table d. It fills the air spaces in the soil with water
Last Answer : b. It may lead to crop yield loss
Description : The Community Feed is slow on the uptake, but that won't stop the party! Let's congratulate @Tropical_Willie on a 10K milestone!
Last Answer : Congratulations!!!
Description : Would you like to share a moment when you were a little slow on the uptake?
Last Answer : answer:I’m too slow to think of anything right now but I just feel like saying: “You monkeys you – you give me back my caps!”
Description : Why is glucose needed for the uptake of mineral ions? -Biology
Description : A large proportion of oxygen is left unused the human blood even after its uptake by the body tissue. This `O_(2)`
Last Answer : A large proportion of oxygen is left unused the human blood even after its uptake by the body ... releasing more `O_(2)` to the epitheliala tissues
Description : Hormone which enhance cellular uptake and utilisation of glucose as well as does hypoglycemia through glucogenesis is
Last Answer : Hormone which enhance cellular uptake and utilisation of glucose as well as does hypoglycemia through glucogenesis is