Stomatal opening is based on (1) Exosrnosis (2) Endosmosis (3) Plasmolysis in guard cells (4) Decrease in concentration of cell sap

Stomatal opening is based on (1) Exosrnosis (2) Endosmosis (3) Plasmolysis in guard cells (4) Decrease in concentration of cell sap
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(2) Endosmosis Explanation: According to the K+ ion theory the guard cells absorb K+ ions from the cells around them as they produce ATP (due to photosynthesis) and become hypertonic. This leads to absorption of water from nearby cells by endosmosis due to which the guard cells become turgid and the stomata opens. Decreasing light intensity and photosynthesis causes Stomatal closing.
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Stomatal opening is based on (1) Exosmosis (2) Endosmosis (3) Plasmolysis in guard cells (4) Decrease in concentration of cell sap

Description : Stomatal opening is based on (1) Exosmosis (2) Endosmosis (3) Plasmolysis in guard cells (4) Decrease in concentration of cell sap

Last Answer : Endosmosis

Which of the following facilitates opening of stomatal aperture? (a) Decrease in turgidity of guard cells (b) Radial orientation of cellulose microfibrils in the cell wall of guard cells (c) Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells (d) Contraction of outer wall of guard cells

Description : Which of the following facilitates opening of stomatal aperture? (a) Decrease in turgidity of guard cells (b) Radial orientation of cellulose microfibrils in the cell wall of guard cells (c) ... microfibrils in the cell wall of guard cells (d) Contraction of outer wall of guard cells

Last Answer : (a) Decrease in turgidity of guard cells

Which of the following facilitates opening of stomatal aperture ? (1) Decrease in turgidity of guard cells (2) Radial orientation of cellulose microfibrils in the cell wall of guard cells (3) Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells (4) Contraction of outer wall of guard cells

Description : Which of the following facilitates opening of stomatal aperture ? (1) Decrease in turgidity of guard cells (2) Radial orientation of cellulose microfibrils in the cell wall of guard cells (3) Longitudinal ... microfibrils in the cell wall of guard cells (4) Contraction of outer wall of guard cells

Last Answer : (2) Radial orientation of cellulose microfibrils in the cell wall of guard cells

Cell becomes turgid because of - (1) Plasmolysis (2) Exosmosis (3) Endosmosis (4) Diffusion

Description : Cell becomes turgid because of - (1) Plasmolysis (2) Exosmosis (3) Endosmosis (4) Diffusion

Last Answer : (3) Endosmosis Explanation: When the plant cell is placed in a hypotonic solution, it takes up water by osmosis and starts to swell, but the cell wall prevents it from bursting. The plant cell is ... become "turgid" i.e. swollen and hard. So it is because of endosmosis that cell becomes turgid.

Cell becomes turgid because of (1) Plasmolysis (2) Exosmosis (3) Endosmosis (4) Diffusion

Description : Cell becomes turgid because of (1) Plasmolysis (2) Exosmosis (3) Endosmosis (4) Diffusion

Last Answer : Endosmosis

How do guard cells regulate opening and closing of stomatal pores ? -Science

Description : How do guard cells regulate opening and closing of stomatal pores ? -Science

Last Answer : The opening and closing of stomatal pores is controlled by the guard cells, when water flows into the guard cells, they swell, become curved and cause the pore to open whereas when the guard cells lose water, they shrink, become straight and close the stomatal pore

(a) Draw a diagram to show open stomatal pore and label on it: (i) guard cells (ii) chloroplast (b) State two functions of stomata. (c) How do guard cells regulate the opening and closing of stomatal pore? -Biology

Description : (a) Draw a diagram to show open stomatal pore and label on it: (i) guard cells (ii) chloroplast (b) State two functions of stomata. (c) How do guard cells regulate the opening and closing of stomatal pore? -Biology

Last Answer : (a) (b) Two functions of stomata are: (i) Exchange of gases between the plant and the atmosphere takes place through stomata. (ii)Transpiration in plants takes place through stomata. ( ... through these stomata, the plant closes these pores when it does not require carbon dioxide for photosynthesis.

The opening and closing of the stomatal pores is a function of the - (1) Guard cells (2) Chloroplast (3) Xylem (4) Phloem

Description : The opening and closing of the stomatal pores is a function of the - (1) Guard cells (2) Chloroplast (3) Xylem (4) Phloem

Last Answer : (1) Guard cells Explanation: The opening and closing of the pores is a function of the guard cells. They swell when water flows into them, causing the stomatal pore to open and likewise, the pore closes if the guard cells shrink.

The special modified epiderniai cells surrounding stomatal pore are called - (1) Epithelial cells (2) Guard cells (3) Subsidiary cells (4) Accessory cells

Description : The special modified epiderniai cells surrounding stomatal pore are called - (1) Epithelial cells (2) Guard cells (3) Subsidiary cells (4) Accessory cells

Last Answer : (2) Guard cells Explanation: The pore is bordered by a pair of specialized parenchyma cells known as guard cells that are responsible for regulating the size of the opening. Guard cells are specialized cells in the epidermis of leaves, stems and other organs that are used to control gas exchange.

In guard cells when sugar is converted into starch, the stomatal pore (a) closes completely (b) opens partially (c) opens fully (d) remains unchanged.

Description : In guard cells when sugar is converted into starch, the stomatal pore (a) closes completely (b) opens partially (c) opens fully (d) remains unchanged.

Last Answer : a) closes completely

Which of the following statements is not true for stomatal apparatus? (a) Guard cells invariably possess chloroplasts and mitochondria. (b) Guard cells are always surrounded by subsidiary cells. (c) Stomata are involved in gaseous exchange. (d) Inner wall of guard cells are thick

Description : Which of the following statements is not true for stomatal apparatus? (a) Guard cells invariably possess chloroplasts and mitochondria. (b) Guard cells are always surrounded by subsidiary cells. (c) Stomata are involved in gaseous exchange. (d) Inner wall of guard cells are thick

Last Answer : (b) Guard cells are always surrounded by subsidiary cells.

The special modified epidermal cells surrounding stomatal pore are called (1) Epithelial cells (2) Guard cells (3) Subsidiary cells (4) Accessory cells

Description : The special modified epidermal cells surrounding stomatal pore are called (1) Epithelial cells (2) Guard cells (3) Subsidiary cells (4) Accessory cells

Last Answer : Guard cells

Which one gives the most valid and recent explanation for stomatal movement? (a) Starch hydrolysis (b) Guard cell photosynthesis (c) Transpiration (d) Potassium influx and efflux

Description : Which one gives the most valid and recent explanation for stomatal movement? (a) Starch hydrolysis (b) Guard cell photosynthesis (c) Transpiration (d) Potassium influx and efflux

Last Answer : (d) Potassium influx and efflux

Given below is the diagram of a stomatal apparatus. In which of the following all the four parts labelled as A, B, C and D are correctly identified? A B C D A B C D (a) Subsidiary Epidermal Guard cell Stomatal cell cell aperture (b) Guard cell Stomatal Subsidiary Epidermal aperture cell cell (c) Epidermal Guard cell Stomatal Subsidiary cell cell aperture (d) Epidermal Subsidiary Stomatal Guard cell cell cell aperture

Description : Given below is the diagram of a stomatal apparatus. In which of the following all the four parts labelled as A, B, C and D are correctly identified? A B C D A B C D ... ) Epidermal Guard cell Stomatal Subsidiary cell cell aperture (d) Epidermal Subsidiary Stomatal Guard cell cell cell aperture

Last Answer : d) Epidermal Subsidiary Stomatal Guard cell cell cell aperture

Explain the mechanism of stomatal opening and closing. -Biology

Description : Explain the mechanism of stomatal opening and closing. -Biology

Last Answer : answer:

Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant duri

Description : Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant duri

Last Answer : Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal ... durign day time, and the other at night.

Which of the following statements are true? 1. Cytokinins promote stomatal opening 2. Sprays of indole -3 acetic acid can inhibit premature fruit fall 3. The growth movements caused by a unilateral stimulus are known as nastic movements 4. The seeds of desert plants will not germinate unless they have been subjected to a high temperature for some time Questions Select the correct answer from the following: (a) 1, 2, and 4 (b) 2 and 4 (c) 1, 2, and 4 (d) 1, 2, 3, and 4

Description : Which of the following statements are true? 1. Cytokinins promote stomatal opening 2. Sprays of indole -3 acetic acid can inhibit premature fruit fall 3. The growth movements caused by a unilateral stimulus are known as nastic movements 4. The ... 4 (b) 2 and 4 (c) 1, 2, and 4 (d) 1, 2, 3, and 4

Last Answer : Ans:(a)

Conversion of starch to sugar is essential for - (1) Stomatal opening (2) Stomatal closing (3) Stomatal formation (4) Stomatal growth

Description : Conversion of starch to sugar is essential for - (1) Stomatal opening (2) Stomatal closing (3) Stomatal formation (4) Stomatal growth

Last Answer : (1) Stomatal opening Explanation: For keeping the stomata open a constant expenditure of energy is required. This is provided by the conversion of starch to sugar. The stomata! opening is, in turn ... at the leaves while their stomata are open for the passage of CO2 and 02 during photosynthesis.

Conversion of starch to organic acids is required for (a) stomatal opening (b) stomatal closing (c) stomatal formation (d) stomatal activity.

Description : Conversion of starch to organic acids is required for (a) stomatal opening (b) stomatal closing (c) stomatal formation (d) stomatal activity.

Last Answer : a) stomatal opening

Water vapour comes out from the plant leaf through the stomatal opening. Through the samestomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options. (a) The above processes happen only during night time. (b) One process occurs during day time and the other at night. (c) Both processes cannot happen simultaneously. (d) Both processes can happen together because the diffusion coefficient of water and CO2 is different

Description : Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above ... Both processes can happen together because the diffusion coefficient of water and CO2 is different

Last Answer : (d) Both processes can happen together because the diffusion coefficient of water and CO2 is different

Conversion of starch to sugar is essential for (1) Stomatal opening (2) Stomatal closing (3) Stomatal formation (4) Stomatal growth

Description : Conversion of starch to sugar is essential for (1) Stomatal opening (2) Stomatal closing (3) Stomatal formation (4) Stomatal growth

Last Answer : Stomatal opening

Opening and closing of stomata is due to the (a) hormonal change in guard cells (b) change in turgor pressure of guard cells (c) gaseous exchange (d) respiration.

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Last Answer : (b) change in turgor pressure of guard cells

Water movement between cells is due to (a) T.P. (b) W.P. (c) D.P.D. (d) incipient plasmolysis.

Description : Water movement between cells is due to (a) T.P. (b) W.P. (c) D.P.D. (d) incipient plasmolysis.

Last Answer : (c) D.P.D.

Stomatal movement is not affected by (a) temperature (b) light (c) O2 concentration (d) CO2 concentration.

Description : Stomatal movement is not affected by (a) temperature (b) light (c) O2 concentration (d) CO2 concentration.

Last Answer : c) O2 concentration

Stomatal movement is not affected by (1) Temperature (2) Light (3) O2 concentration (4) CO2 concentration

Description : Stomatal movement is not affected by (1) Temperature (2) Light (3) O2 concentration (4) CO2 concentration

Last Answer : (3) O2 concentration

SO2 pollution causes a) Plasmolysis b) Destruction of cell wall c) Destruction of Golgi bodies

Description : SO2 pollution causes a) Plasmolysis b) Destruction of cell wall c) Destruction of Golgi bodies

Last Answer : c) Destruction of Golgi bodies

The nutritive tissue around the embryo in seed is a. Endosmosis b. Endodermis c. Endosperm d. Embryo-sac

Description : The nutritive tissue around the embryo in seed is a. Endosmosis b. Endodermis c. Endosperm d. Embryo-sac

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What is plasmolysis ? -Biology

Description : What is plasmolysis ? -Biology

Last Answer : When a living plant cell loses water through osmosis there is shrinkage or contraction of the contents of the cell away from the cell wall. This phenomenon is known as Plasmolysis.

When does plasmolysis occur? -Biology

Description : When does plasmolysis occur? -Biology

Last Answer : answer:

What is plasmolysis? -Biology

Description : What is plasmolysis? -Biology

Last Answer : answer:

Relationship between hypertonic and plasmolysis? -Biology

Description : Relationship between hypertonic and plasmolysis? -Biology

Last Answer : answer:

What is incipient plasmolysis? -Biology

Description : What is incipient plasmolysis? -Biology

Last Answer : answer:

The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is (a) transpiration (b) root pressure (c) imbibition (d) plasmolysis.

Description : The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is (a) transpiration (b) root pressure (c) imbibition (d) plasmolysis.

Last Answer : b) root pressure

Consider the following pairs Plant hormone Function/Effect 1. Indole-3 acetic acid — Rooting in cuttings 2. Gibberellic acid — Stomatal closure 3. Ethylene — Fruit ripening 4. Zeatin — Cell division Which of the above pairs are correctly matched? Select the correct answer from the following: (a) 1 and 3 (b) 1, 2, and 4 (c) 2 and 4 (d) 1, 2, 3, and 4

Description : Consider the following pairs Plant hormone Function/Effect 1. Indole-3 acetic acid - Rooting in cuttings 2. Gibberellic acid - Stomatal closure 3. Ethylene - Fruit ripening 4. Zeatin - Cell division Which of the above pairs are correctly matched ... 3 (b) 1, 2, and 4 (c) 2 and 4 (d) 1, 2, 3, and 4

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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

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

Based on PageRank algorithm, Google returns __________ for a query that is parsed for its keywords. a) SEP b) SAP c) SERP d) Business Objects Build

Description : Based on PageRank algorithm, Google returns __________ for a query that is parsed for its keywords. a) SEP b) SAP c) SERP d) Business Objects Build

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Based on PageRank algorithm, Google returns __________ for a query that is parsed for its keywords. a) SEP b) SAP c) SERP d) Business Objects Build

Description : Based on PageRank algorithm, Google returns __________ for a query that is parsed for its keywords. a) SEP b) SAP c) SERP d) Business Objects Build

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You have changed parameters for AS Java of your SAP system based on AS ABAP+ Java. A restart of AS Java is requiredHow can you stop and start the Java stack without restarting the ABAP stack? A. Use the Config tool B. Use transaction, SAP Servers (SM51) C. Use transaction, ICM Monitors (SMICM) D. Use transaction CCMS Control panel: Display Statuses and alerts (RZ03)

Description : You have changed parameters for AS Java of your SAP system based on AS ABAP+ Java. A restart of AS Java is requiredHow can you stop and start the Java stack without restarting the ABAP ... transaction, ICM Monitors (SMICM) D. Use transaction CCMS Control panel: Display Statuses and alerts (RZ03)

Last Answer : C. Use transaction, ICM Monitors (SMICM)

Which of the following settings can you make during the installation of an AS ABAP-based SAP ECC 6.06 system? Note: there are 2 correct answered to this question A. The number of clients in the SAP system B. The number and types of work processes C. The master password for some default users in this SAP system D. The ABAP message server port

Description : Which of the following settings can you make during the installation of an AS ABAP-based SAP ECC 6.06 system? Note: there are 2 correct answered to this question A. The number of clients in the ... C. The master password for some default users in this SAP system D. The ABAP message server port

Last Answer : C. The master password for some default users in this SAP system D. The ABAP message server port

You want to provide authorizations to a new user in an SAP system based on ASJava 7.10 or higherHow can you do this with the user management engine (UME)? Note: there are 2 correct answered to this question A. Add some actions to the user directly B. Add some actions to a role, then assign this role to the user C. Add some actions to a role, assign this role to a group, then assign thisgroup to the user D. Add some actions to a group, then assign this group to the use

Description : You want to provide authorizations to a new user in an SAP system based on ASJava 7.10 or higherHow can you do this with the user management engine (UME)? Note: there are 2 correct answered to this ... assign thisgroup to the user D. Add some actions to a group, then assign this group to the use

Last Answer : B. Add some actions to a role, then assign this role to the user C. Add some actions to a role, assign this role to a group, then assign thisgroup to the user

Consider an SAP system based on AS ABAP How many monitoring segments are used for the CCMS Monitoring Infrastructure? A. There is one monitoring segment for each host B. There is one monitoring segment for each database used by an SAP system C. There is one monitoring segment for each application server D. There is one monitoring segment for each central services instance

Description : Consider an SAP system based on AS ABAP How many monitoring segments are used for the CCMS Monitoring Infrastructure? A. There is one monitoring segment for each host B. There is ... segment for each application server D. There is one monitoring segment for each central services instance

Last Answer : A. There is one monitoring segment for each host

Assuming that you have all required authorizations, which functions can you access in SAP GUI for Java? A. Functions provided by SAP business One B. Functions provided by transactions in AS ABAP based SAP system C. Functions provided by SAP NetWeaver Developer Studio D. Functions provided by AS Java SAP systems

Description : Assuming that you have all required authorizations, which functions can you access in SAP GUI for Java? A. Functions provided by SAP business One B. Functions provided by transactions in AS ... C. Functions provided by SAP NetWeaver Developer Studio D. Functions provided by AS Java SAP systems

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What does an authorization profile in an AS ABAP based SAP system contains? A. collection of authorizations B. The user menu C. Profile parameters, such as the password expiration time(login/password_expiration_time) D. The collection of the authorizations checks that a user has passed successfully

Description : What does an authorization profile in an AS ABAP based SAP system contains? A. collection of authorizations B. The user menu C. Profile parameters, such as the password ... (login/password_expiration_time) D. The collection of the authorizations checks that a user has passed successfully

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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

The most active site of protein synthesis is the (A) Nucleus (B) Ribosome (C) Mitochondrion (D) Cell sap

Description : The most active site of protein synthesis is the (A) Nucleus (B) Ribosome (C) Mitochondrion (D) Cell sap

Last Answer : B

Pruning in old fruit trees increases fruit bud formation by increasing ______: a. Carbohydrates b. New vegetative growth c. Hormonal contents d. Cell sap

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

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.

Cell sap is found inside a. Protoplasm b. Cytoplasm c. Nucleoplasm d. Vacuole

Description : Cell sap is found inside a. Protoplasm b. Cytoplasm c. Nucleoplasm d. Vacuole

Last Answer : d. Vacuole

What is stomatal apparatus? -Biology

Description : What is stomatal apparatus? -Biology

Last Answer : answer: