Cohesion-tension theory of sap ascent -Biology

Cohesion-tension theory of sap ascent -Biology
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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.

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.

Cohesion and adhesion in the ascent of xylem sap. -Biology

Description : Cohesion and adhesion in the ascent of xylem sap. -Biology

Last Answer : answer:

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

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.

By whom was the most accepted theory for ascent of sap was given? -Do You Know?

Description : By whom was the most accepted theory for ascent of sap was given? -Do You Know?

Last Answer : answer:

What factors determine the ascent of xylem sap in a plant? -Biology

Description : What factors determine the ascent of xylem sap in a plant? -Biology

Last Answer : answer:

Ascent of sap in plants takes place through – (1) Pith (2) Phloem (3) Cambium (4) Xylem

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.

Which one increases in the absence of light? (a) Uptake of minerals (b) Uptake of water (c) Elongation of internodes (d) Ascent of sap

Description : Which one increases in the absence of light? (a) Uptake of minerals (b) Uptake of water (c) Elongation of internodes (d) Ascent of sap

Last Answer : (c) Elongation of internodes

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.

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

Ascent of sap in plants takes place through (1) Pith (2) Phloem (3) Cambium (4) Xylem

Description : Ascent of sap in plants takes place through (1) Pith (2) Phloem (3) Cambium (4) Xylem

Last Answer : Xylem

What is the cohesion tension theory? -Biology

Description : What is the cohesion tension theory? -Biology

Last Answer : answer:

In the cohesion-tension theory cohesion refers to the -Biology

Description : In the cohesion-tension theory cohesion refers to the -Biology

Last Answer : answer:

What is the transpiration-cohesion-tension mechanism? -Biology

Description : What is the transpiration-cohesion-tension mechanism? -Biology

Last Answer : answer:

A solid needle placed horizontally on the surface of the water floats due to (a) Surface tension (b) Capillary action (c) Cohesion (d) Adhesion

Description : A solid needle placed horizontally on the surface of the water floats due to (a) Surface tension (b) Capillary action (c) Cohesion (d) Adhesion

Last Answer : Ans:(a)

Soldering of two metals is possible because of the property of – (1) Viscosity (2) Osmosis (3) Cohesion (4) Surface tension

Description : Soldering of two metals is possible because of the property of – (1) Viscosity (2) Osmosis (3) Cohesion (4) Surface tension

Last Answer : (3) Cohesion Explanation: Soldering is the process of joining two metals by the use of a solder alloy, and it is one of the oldest known joining techniques. It is possible because of the ... through-out the interior of substance. Soldering leads to alloy formation at the layer between two metals.

The fluid property, due to which, mercury does not wet the glass is (A) Surface tension (B) Viscosity (C) Cohesion (D) Adhesion

Description : The fluid property, due to which, mercury does not wet the glass is (A) Surface tension (B) Viscosity (C) Cohesion (D) Adhesion

Last Answer : (A) Surface tension

The fluid property, due to which, mercury does not wet the glass is (A) Surface tension (B) Viscosity (C) Cohesion (D) Adhesion

Description : The fluid property, due to which, mercury does not wet the glass is (A) Surface tension (B) Viscosity (C) Cohesion (D) Adhesion

Last Answer : (A) Surface tension

Surface tension of a liquid (A) Is due to intermolecular forces of cohesion (B) Decreases with rise in temperature (C) Is responsible for the spherical shape of an isolated liquid drop (D) All (A), (B) & (C)

Description : Surface tension of a liquid (A) Is due to intermolecular forces of cohesion (B) Decreases with rise in temperature (C) Is responsible for the spherical shape of an isolated liquid drop (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Property responsible for the talcum powder to cling to the skin is the (A) Capillary action (B) Adhesion (C) Cohesion (D) Surface tension

Description : Property responsible for the talcum powder to cling to the skin is the (A) Capillary action (B) Adhesion (C) Cohesion (D) Surface tension

Last Answer : Option B

The process of diffusion of one liquid into the other through a semi permeable membrane is called (A) Viscosity (B) Osmosis (C) Surface tension (D) Cohesion

Description : The process of diffusion of one liquid into the other through a semi permeable membrane is called (A) Viscosity (B) Osmosis (C) Surface tension (D) Cohesion

Last Answer : Answer: Option B

The mercury does not wet the glass. This is due to the property of the liquid known as (A) Cohesion (B) Adhesion (C) Viscosity (D) Surface tension

Description : The mercury does not wet the glass. This is due to the property of the liquid known as (A) Cohesion (B) Adhesion (C) Viscosity (D) Surface tension

Last Answer : Answer: Option D

Mercury does not wet glass. This is due to property of liquid known as (A) Adhesion (B) Cohesion (C) Surface tension (D) Viscosity

Description : Mercury does not wet glass. This is due to property of liquid known as (A) Adhesion (B) Cohesion (C) Surface tension (D) Viscosity

Last Answer : Answer: Option C

Falling drops of water become spheres due to the property of (A) Adhesion (B) Cohesion (C) Surface tension (D) Viscosity

Description : Falling drops of water become spheres due to the property of (A) Adhesion (B) Cohesion (C) Surface tension (D) Viscosity

Last Answer : Answer: Option C

Free surface of a liquid tends to contract to the smallest possible area due to force of (A) Surface tension (B) Viscosity (C) Friction (D) Cohesion

Description : Free surface of a liquid tends to contract to the smallest possible area due to force of (A) Surface tension (B) Viscosity (C) Friction (D) Cohesion

Last Answer : Answer: Option A

Surface energy per unit area of a surface is numerically equal to (A) Atmospheric pressure (B) Surface tension (C) Force of adhesion (D) Force of cohesion

Description : Surface energy per unit area of a surface is numerically equal to (A) Atmospheric pressure (B) Surface tension (C) Force of adhesion (D) Force of cohesion

Last Answer : Answer: Option B

Capillary action is due to the (A) Surface tension (B) Cohesion of the liquid (C) Adhesion of the liquid molecules and the molecules on the surface of a solid (D) All of the above

Description : Capillary action is due to the (A) Surface tension (B) Cohesion of the liquid (C) Adhesion of the liquid molecules and the molecules on the surface of a solid (D) All of the above

Last Answer : Answer: Option D

The tendency of a liquid surface to contract is due to the following property (A) Cohesion (B) Adhesion (C) Viscosity (D) Surface tension

Description : The tendency of a liquid surface to contract is due to the following property (A) Cohesion (B) Adhesion (C) Viscosity (D) Surface tension

Last Answer : Answer: Option D

The property of a fluid which enables it to resist tensile stress is known as (A) Compressibility (B) Surface tension (C) Cohesion (D) Adhesion

Description : The property of a fluid which enables it to resist tensile stress is known as (A) Compressibility (B) Surface tension (C) Cohesion (D) Adhesion

Last Answer : Answer: Option C

The property of fluid by virtue of which it offers resistance to shear is called (A) Surface tension (B) Adhesion (C) Cohesion (D) Viscosity

Description : The property of fluid by virtue of which it offers resistance to shear is called (A) Surface tension (B) Adhesion (C) Cohesion (D) Viscosity

Last Answer : Answer: Option D

Soldering of two metals is possible because of the property of : (1) Viscosity (2) Osmosis (3) Cohesion (4) Surface tension

Description : Soldering of two metals is possible because of the property of : (1) Viscosity (2) Osmosis (3) Cohesion (4) Surface tension

Last Answer : Cohesion

Who'll help me celebrate Darwin's ascent to the 10k heights?

Description : Who'll help me celebrate Darwin's ascent to the 10k heights?

Last Answer : Congrats Darwin!

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

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).

What causes cell juice ascent ?

Description : What causes cell juice ascent ?

Last Answer : Cell sap ascending occurs through vessels.

What is the English version of cell ascent ?

Description : What is the English version of cell ascent ?

Last Answer : English Ascent of sap.

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 inversion is 090/30. What is the safest departure procedure? a. Take-off is not possible under these conditions b. Depart on runway 09 with a tailwind c. Depart runway 27 with maximum throttle during the passage through the inversion d. Depart runway 27 with as steep an ascent as possible

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

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

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

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 inversion is 090/30. What is the safest departure procedure? a. Take-off is not possible under these conditions b. Depart on runway 09 with a tailwind c. Depart runway 27 with maximum throttle during the passage through the inversion d. Depart runway 27 with as steep an ascent as possible

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

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

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

What is cohesion of stamen? -Biology

Description : What is cohesion of stamen? -Biology

Last Answer : answer:

What are the different types of cohesion of stamens? -Biology

Description : What are the different types of cohesion of stamens? -Biology

Last Answer : Cohesion of stamen : Usually following types of cohesion among stamens occur.

What does phloem sap contain? -Biology

Description : What does phloem sap contain? -Biology

Last Answer : answer:

Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum Principal stress theory (d) None

Description : Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum Principal stress theory (d) None

Last Answer : (c) Thirdly Maximum Principal stress theory

Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum shear stress theory (d) None

Description : Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum shear stress theory (d) None

Last Answer : (d) None

Under maximum shear stress theory, maximum shear stress is equal to (a) Allowable stress in tension (b) Allowable stress in compression (c) Allowable stress in shear (d) None

Description : Under maximum shear stress theory, maximum shear stress is equal to (a) Allowable stress in tension (b) Allowable stress in compression (c) Allowable stress in shear (d) None

Last Answer : (c) Allowable stress in shear

Under maximum principal stress theory, maximum principal stress is equal to (a) Allowable stress in tension (b) Allowable stress in compression (c) Allowable stress in shear (d) None

Description : Under maximum principal stress theory, maximum principal stress is equal to (a) Allowable stress in tension (b) Allowable stress in compression (c) Allowable stress in shear (d) None

Last Answer : (a) Allowable stress in tension

The assumption in the theory of bending of beams is: (A) Material is homogeneous (B) Material is isotropic (C) Young's modulus is same in tension as well as in compression (D) All the above

Description : The assumption in the theory of bending of beams is:  (A) Material is homogeneous  (B) Material is isotropic  (C) Young's modulus is same in tension as well as in compression  (D) All the above 

Last Answer : (D) All the above 

Pick up the correct assumption of the theory of simple bending (A) The value of the Young's modulus is the same in tension as well as in compression (B) Transverse section of a beam remains plane before and after bending (C) The material of the beam is homogeneous and isotropic (D) All the above

Description : Pick up the correct assumption of the theory of simple bending  (A) The value of the Young's modulus is the same in tension as well as in compression  (B) Transverse section of a beam remains ... bending  (C) The material of the beam is homogeneous and isotropic  (D) All the above

Last Answer : (D) All the above

According to the steel beam theory of doubly reinforced beams (A) Tension is resisted by tension steel (B) Compression is resisted by compression steel (C) Stress in tension steel equals the stress in compression steel (D) All the above

Description : According to the steel beam theory of doubly reinforced beams (A) Tension is resisted by tension steel (B) Compression is resisted by compression steel (C) Stress in tension steel equals the stress in compression steel (D) All the above

Last Answer : Answer: Option D

According to steel Beam theory, stress in compressive steel is ------- stress in tension steel [ A ] less than [ B ] greater than [ C ] equal to [ D ] twice

Description : According to steel Beam theory, stress in compressive steel is ------- stress in tension steel [ A ] less than [ B ] greater than [ C ] equal to [ D ] twice

Last Answer : [ C ] equal to

Explain Laplace’s molecular theory of liquid & hence define surface tension.

Description : Explain Laplace’s molecular theory of liquid & hence define surface tension. 

Last Answer : Consider three molecules A, B & C of the liquid. A sphere of influence is drawn as shown in fig.The sphere of influence of molecule A' is completely inside the liquid, so it ... surface of liquid is under constant tension due to the tendency to contract and occupy minimum surface area. 

What does social cohesion mean ?

Description : What does social cohesion mean ?

Last Answer : Social cohesion refers to the emotional unity by which people are connected to each other. That is to say, the social consciousness or bond in which people feel one another , help one another , is social cohesion.