Water from soil enters into the root hairs owing to : (1) Atmospheric pressure (2) Capillary pressure (3) Root pressure (4) Osmotic pressure

Water from soil enters into the root hairs owing to : (1) Atmospheric pressure (2) Capillary pressure (3) Root pressure (4) Osmotic pressure
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Capillary pressure
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Water from soil enters into the root hairs owing to : (1) Atmospheric pressure (2) Capillary pressure (3) Root pressure (4) Osmotic pressure

Description : Water from soil enters into the root hairs owing to : (1) Atmospheric pressure (2) Capillary pressure (3) Root pressure (4) Osmotic pressure

Last Answer : (2) Capillary pressure Explanation: In plants, the transpiration stream is the uninterrupted stream of water, and other, which is taken up by the roots and, via the xylem vessels, ... the difference in water potential between the soil and the substomatal cavity caused by transpiration.

Root pressure develops due to (a) passive absorption (b) active absorption (c) increase in transpiration (d) low osmotic potential in soil.

Description : Root pressure develops due to (a) passive absorption (b) active absorption (c) increase in transpiration (d) low osmotic potential in soil.

Last Answer : (b) active absorption

The growth of seedling plants after transplantation will not always be proper because (a) New soil may not contain the required minerals (b) During transplantation root hairs get damaged (c) Roots cannot penetrate deep into the soil (d) Of all factors stated above

Description : The growth of seedling plants after transplantation will not always be proper because (a) New soil may not contain the required minerals (b) During transplantation root hairs get damaged (c) Roots cannot penetrate deep into the soil (d) Of all factors stated above

Last Answer : Ans:(d)

Root hairs absorb water from soil due to

Description : Root hairs absorb water from soil due to

Last Answer : Root hairs absorb water from soil due to A. Osmotic pressure B. Atmospheric pressure C. Turgor pressure D. Suciton pressure

Capillary water is held at atmospheric pressure — a. 1/3 to 31 b. 31 to 10000 c. > 10000 d. o to 1/3

Description : Capillary water is held at atmospheric pressure — a. 1/3 to 31 b. 31 to 10000 c. > 10000 d. o to 1/3

Last Answer : a. 1/3 to 31

In an oil lamp, the oil rises up in the wick due to _____? A. Capillary action B. Atmospheric pressure C. Viscosity of oil D. Change in temperature

Description : In an oil lamp, the oil rises up in the wick due to _____? A. Capillary action B. Atmospheric pressure C. Viscosity of oil D. Change in temperature

Last Answer : ANSWER: A

In an oil lamp, the oil rises up in the wick due to? A. Capillary action (Answer) B. Atmospheric pressure C. Viscosity of oil D. Change in temperature

Description : In an oil lamp, the oil rises up in the wick due to? A. Capillary action (Answer) B. Atmospheric pressure C. Viscosity of oil D. Change in temperature

Last Answer : A. Capillary action (Answer)

Potometer works on the principle of (a) osmotic pressure (b) amount of water absorbed equals the amount transpired (c) root pressure (d) potential difference between the tip of the tube and that of the plant.

Description : Potometer works on the principle of (a) osmotic pressure (b) amount of water absorbed equals the amount transpired (c) root pressure (d) potential difference between the tip of the tube and that of the plant.

Last Answer : (b) amount of water absorbed equals the amount transpired

In soil, the water available for root absorption is (a) gravitational water (b) capillary water (c) hygroscopic water (d) combined water

Description : In soil, the water available for root absorption is (a) gravitational water (b) capillary water (c) hygroscopic water (d) combined water

Last Answer : (b) capillary water

Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the (A) Osmotic pressure of the soil water becomes less than that of the plant sap (B) Soil becomes too alkaline (C) Osmotic pressure of the soil water becomes higher than that of the plant sap (D) Soil becomes too acidic

Description : Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the (A) Osmotic pressure of the soil water becomes less than that of the plant sap (B) Soil ... pressure of the soil water becomes higher than that of the plant sap (D) Soil becomes too acidic

Last Answer : (C) Osmotic pressure of the soil water becomes higher than that of the plant sa

Water will be absorbed by root hairs, then how is when the external medium? -General Knowledge

Description : Water will be absorbed by root hairs, then how is when the external medium? -General Knowledge

Last Answer : The answer is 'Hypotonic'

Water will be absorbed by root hairs, then how is when the external medium? -General Knowledge

Description : Water will be absorbed by root hairs, then how is when the external medium? -General Knowledge

Last Answer : answer:

Water will be absorbed by root hairs, then how is when the external medium? -General Knowledge

Description : Water will be absorbed by root hairs, then how is when the external medium? -General Knowledge

Last Answer : answer:

How do plants absorb water through root hairs ?

Description : How do plants absorb water through root hairs ?

Last Answer : Answer : Plants absorb water through unicellular root hairs.

Plants absorb most of the water needed by them through their (a) Embryonic zone (b) Growing point (c) Root hairs (d) Zone of elongation

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)

In plants water is absorbed by the root hairs by a process called: (1) Transpiration (2) Respiration (3) Perspiration (4) Osmosis

Description : In plants water is absorbed by the root hairs by a process called: (1) Transpiration (2) Respiration (3) Perspiration (4) Osmosis

Last Answer : (4) Osmosis Explanation: Plants absorb water from their root hairs on the root via osmosis. It is then transported to other parts of the plant. (through the network of xylem vessels) through a combination of capillary action and "transiprational pull".

Water will be absorbed by root hairs, then how is when the external medium?

Description : Water will be absorbed by root hairs, then how is when the external medium?

Last Answer : Hypotonic

In plants water is absorbed by the root hairs by a process called: (1) Transpiration (2) Respiration (3) Perspiration (4) Osmosis

Description : In plants water is absorbed by the root hairs by a process called: (1) Transpiration (2) Respiration (3) Perspiration (4) Osmosis

Last Answer : Osmosis

Why do roots have root hairs? -Biology

Description : Why do roots have root hairs? -Biology

Last Answer : answer:

Root Hairs arise from - (1) Cortex (2) Pericycle (3) Epidermis (4) Endodermis

Description : Root Hairs arise from - (1) Cortex (2) Pericycle (3) Epidermis (4) Endodermis

Last Answer : (3) Epidermis Explanation: Root hairs are tubular-shaped tipgrowing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root ... the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system.

Root hairs develop from the region of : (1) Elongation (2) root cap (3) Meristematic activity (4) Maturation

Description : Root hairs develop from the region of : (1) Elongation (2) root cap (3) Meristematic activity (4) Maturation

Last Answer : (4) Maturation

Root Hairs arise from (1) Cortex (2) Pericycle (3) Epidermis (4) Endodermis

Description : Root Hairs arise from (1) Cortex (2) Pericycle (3) Epidermis (4) Endodermis

Last Answer : Epidermis

The only plant cells without nuclei among the following are : (1) Cambium cells (2) Root hairs (3) Companion cells (4) Tracheid cells

Description : The only plant cells without nuclei among the following are : (1) Cambium cells (2) Root hairs (3) Companion cells (4) Tracheid cells

Last Answer : Cambium cells

which of the following statements is not true for scattering of light? (a) Colour of the scattered tight depends on the size of particles of the atmosphere. (b) Red light is least scattered in the atmosphere. (c) Scattering of light Lakes place as various colours of white light travel with different speed in fir. d) The fine particles in the atmospheric air scatter the blue, light more strongly than red. So the scattered blue light enters our eyes.

Description : which of the following statements is not true for scattering of light? (a) Colour of the scattered tight depends on the size of particles of the atmosphere. (b) Red light is least scattered in the ... air scatter the blue, light more strongly than red. So the scattered blue light enters our eyes.

Last Answer : (c) Scattering of light Lakes place as various colours of white light travel with different speed in fir.

A solid needle placed horizon-tally on the surface of the water floats due to – (1) capillary action (2) water pressure (3) surface tension of water (4) viscosity of water

Description : A solid needle placed horizon-tally on the surface of the water floats due to – (1) capillary action (2) water pressure (3) surface tension of water (4) viscosity of water

Last Answer : (3) surface tension of water Explanation: A solid needle placed horizontally on the surface of water floats due to surface tension of water.

A solid needle placed horizontally on the surface of the water floats due to (1) capillary action (2) water pressure (3) surface tension of water (4) viscosity of water

Description : A solid needle placed horizontally on the surface of the water floats due to (1) capillary action (2) water pressure (3) surface tension of water (4) viscosity of water

Last Answer : surface tension of water

The oil in the wick of an oil lamp rises up due to: (1) capillary action (2) low viscosity of oil (3) gravitational force (4) pressure difference

Description : The oil in the wick of an oil lamp rises up due to: (1) capillary action (2) low viscosity of oil (3) gravitational force (4) pressure difference

Last Answer : (1) capillary action Explanation: The oil in the wick of an oil lamp rises up due to capillary action.

The oil in the wick of an oil lamp rises up due to: (1) capillary action (2) low viscosity of oil (3) gravitational force (4) pressure difference

Description : The oil in the wick of an oil lamp rises up due to: (1) capillary action (2) low viscosity of oil (3) gravitational force (4) pressure difference

Last Answer : capillary action

A land is known as waterlogged (A) When the permanent wilting point is reached (B) When gravity drainage has ceased (C) Capillary fringe reaches the root zone of plants (D) None of the above

Description : A land is known as waterlogged (A) When the permanent wilting point is reached (B) When gravity drainage has ceased (C) Capillary fringe reaches the root zone of plants (D) None of the above

Last Answer : Answer: Option C

The haemodialyzer has semi-permeable lining of tubes which help to: (a) To maintain osmotic pressure of blood. (b) To filter nitrogenous wastes from the dialyzing solution. (c) In passing the waste product, in the dialyzing solution. (d) To pump purified blood back into the body of the patient.

Description : The haemodialyzer has semi-permeable lining of tubes which help to: (a) To maintain osmotic pressure of blood. (b) To filter nitrogenous wastes from the dialyzing solution. (c) In passing the waste product, in the dialyzing solution. (d) To pump purified blood back into the body of the patient.

Last Answer : (c) In passing the waste product, in the dialyzing solution.

Colloid osmotic pressure of intracellular fluid is (A) Equal to that of plasma (B) More than that of plasma (C) More than that of plasma (D) Nearly zero WATER AND ELECTROLYTE BALANCE 285

Description : Colloid osmotic pressure of intracellular fluid is (A) Equal to that of plasma (B) More than that of plasma (C) More than that of plasma (D) Nearly zero WATER AND ELECTROLYTE BALANCE 285

Last Answer : Answer : B

When a cell is fully turgid, which of the following will be zero? (a) Turgor pressure (b) Water potential (c) Wall pressure (d) Osmotic pressure

Description : When a cell is fully turgid, which of the following will be zero? (a) Turgor pressure (b) Water potential (c) Wall pressure (d) Osmotic pressure

Last Answer : (b) Water potential

Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be (a) no movement of water(b) equilibrium between the two (c) movement of water from cell A to B (d) movement of water from cell B to A.

Description : Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure ... two (c) movement of water from cell A to B (d) movement of water from cell B to A.

Last Answer : (c) movement of water from cell A to B

An osmotic diuretic, such as Mannitol, is given to the patient with increased intracranial pressure (IICP) in order to a) dehydrate the brain and reduce cerebral edema. Osmotic diuretics draw water across intact membranes, thereby reducing the volume of brain and extracellular fluid.

Description : An osmotic diuretic, such as Mannitol, is given to the patient with increased intracranial pressure (IICP) in order to a) dehydrate the brain and reduce cerebral edema. Osmotic diuretics ... Medications such as barbiturates are given to the patient with IICP to reduce cellular metabolic demands.

Last Answer : a) dehydrate the brain and reduce cerebral edema. Osmotic diuretics draw water across intact membranes, thereby reducing the volume of brain and extracellular fluid.

Oncotic pressure refers to a) the osmotic pressure exerted by proteins. Oncotic pressure is a pulling pressure exerted by proteins, such as albumin. b) the number of dissolved particles contained in a unit of fluid. Osmolality refers to the number of dissolved particles contained in a unit of fluid. c) the excretion of substances such as glucose through increased urine output. Osmotic diuresis occurs when the urine output increases due to excretion of substances such as glucose. d) the amount of pressure needed to stop flow of water by osmosis. Osmotic pressure is the amount of pressure needed to stop the flow of water by osmosis.

Description : Oncotic pressure refers to a) the osmotic pressure exerted by proteins. Oncotic pressure is a pulling pressure exerted by proteins, such as albumin. b) the number of dissolved particles contained in a ... . Osmotic pressure is the amount of pressure needed to stop the flow of water by osmosis.

Last Answer : a) the osmotic pressure exerted by proteins. Oncotic pressure is a pulling pressure exerted by proteins, such as albumin.

Choose the correct statement about osmotic diuretics: A. They are large molecular weight substances which form colloidal solution B. Their primary site of action is collecting ducts in the kidney C. They increase water excretion without increasing salt excretion D. They can lower intraocular pressure

Description : Choose the correct statement about osmotic diuretics: A. They are large molecular weight substances which form colloidal solution B. Their primary site of action is collecting ducts in the ... C. They increase water excretion without increasing salt excretion D. They can lower intraocular pressure

Last Answer : D. They can lower intraocular pressure

In plant-water relationships, symbol ‘YW’ is used to represent (1) Osmotic pressure (2) Water potential (3) Solute potential (4) Osmosis

Description : In plant-water relationships, symbol ‘YW’ is used to represent (1) Osmotic pressure (2) Water potential (3) Solute potential (4) Osmosis

Last Answer : Water potential

The water, retained by the soil in capillary pores (micropores), against gravity (-1/3 to - 31 bar) by the force of surface tension

Description : The water, retained by the soil in capillary pores (micropores), against gravity (-1/3 to - 31 bar) by the force of surface tension

Last Answer : Ans.Capillary water

The soil water which is of the greatest importance to the plant life is– (1) Gravitational water (2) Capillary water (3) Hygroscopic water (4) Combined water

Description : The soil water which is of the greatest importance to the plant life is– (1) Gravitational water (2) Capillary water (3) Hygroscopic water (4) Combined water

Last Answer : (2) Capillary water Explanation: Capillarity is the primary force that enables the soil to retain water, as well as to regulate its movement. The phenomenon of capillarity also occurs in the soil. In ... is of no use to plants because it occupies the larger pores. It reduces aeration in the soil.

Water logging of soil makes it physiologically dry because (a) this condition does not allow the capillary force to work (b) this condition does not allow oxygen to enter the soil(c) both (a) and (b) (d) none of these

Description : Water logging of soil makes it physiologically dry because (a) this condition does not allow the capillary force to work (b) this condition does not allow oxygen to enter the soil(c) both (a) and (b) (d) none of these

Last Answer : (b) this condition does not allow oxygen to enter the soil

In soil, water available for plants is (a) gravitational water (b) chemically bound water (c) capillary water (d) hygroscopic water.

Description : In soil, water available for plants is (a) gravitational water (b) chemically bound water (c) capillary water (d) hygroscopic water.

Last Answer : (c) capillary water

Soil water which moves mostly in Vapour form is — a. Field capacity water b. Capillary water c. Gravitational water d. Hygroscopic water

Description : Soil water which moves mostly in Vapour form is — a. Field capacity water b. Capillary water c. Gravitational water d. Hygroscopic water

Last Answer : d. Hygroscopic water

The capillary rise of water (A) Depends upon the force responsible (B) Increases as the size of the soil particles increases (C) Decreases as the size of the soil particles decreases (D) Is less in wet soil than in dry soil

Description : The capillary rise of water (A) Depends upon the force responsible (B) Increases as the size of the soil particles increases (C) Decreases as the size of the soil particles decreases (D) Is less in wet soil than in dry soil

Last Answer : (A) Depends upon the force responsible

Water logging of soil makes it physiologically dry because- (a) This condition does not allow the capillary force to work b) this condition does not allow oxygen to enter the soil C) both (a) and (b) d) none of these

Description : Water logging of soil makes it physiologically dry because- (a) This condition does not allow the capillary force to work b) this condition does not allow oxygen to enter the soil C) both (a) and (b) d) none of these 

Last Answer : b) this condition does not allow oxygen to enter the soil

The soil water which is of the greatest importance to the plant life is (1) Gravitational water (2) Capillary water (3) Hygroscopic water (4) Combined water

Description : The soil water which is of the greatest importance to the plant life is (1) Gravitational water (2) Capillary water (3) Hygroscopic water (4) Combined water

Last Answer :  Capillary water

Differentiate between Osmotic Pressure and Osmotic Potential. -Biology

Description : Differentiate between Osmotic Pressure and Osmotic Potential. -Biology

Last Answer : answer:

Osmotic pressure is maintained by blood colloid

Description : Osmotic pressure is maintained by blood colloid

Last Answer : Osmotic pressure is maintained by blood colloid A. Albumin B. Globulin C. Fibrinogen D. Thrombin

Blood colloidal osmotic pressure mainly maintained by which plasma protein `:-`

Description : Blood colloidal osmotic pressure mainly maintained by which plasma protein `:-`

Last Answer : Blood colloidal osmotic pressure mainly maintained by which plasma protein `:-` A. Globulin B. Albumin C. Fibrinogen D. Prothombin

$ those subtances which reduce the rate of transpiration are called transpirants. ! Imbibition causes Osmotic pressure.

Description : $ those subtances which reduce the rate of transpiration are called transpirants. ! Imbibition causes Osmotic pressure.

Last Answer : $ those subtances which reduce the rate of transpiration are called transpirants. ! Imbibition causes Osmotic ... D. If both As and R are wrong.

Contribution of albumin to colloid osmotic pressure of plasma is about (A) 10% (B) 50% (C) 80% (D) 90%

Description : Contribution of albumin to colloid osmotic pressure of plasma is about (A) 10% (B) 50% (C) 80% (D) 90%

Last Answer : Answer : C