Plants are killed in winter by frost because (a) No photosynthesis occurs at low temperature (b) Of desiccation (c) Water in the plants freezes (d) Water in the plants evaporates

Plants are killed in winter by frost because (a) No photosynthesis occurs at low temperature (b) Of desiccation (c) Water in the plants freezes (d) Water in the plants evaporates
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Plants are dried up in winter due to frost because – (1) Evaporation does not take place (2) Photosynthesis does not take place at such low temperature (3) Respiration does not take place at low temperature (4) There is mechanical loss of tissues and drought condition prevails

Description : Plants are dried up in winter due to frost because – (1) Evaporation does not take place (2) Photosynthesis does not take place at such low temperature (3) Respiration does not take place at low temperature (4) There is mechanical loss of tissues and drought condition prevails

Last Answer : (4) There is mechanical loss of tissues and drought condition prevails Explanation: Respiration does not rely on the sun, so it is possible for plants to respire around the clock. The rate of respiration ... drought in that frozen water is unavailable to the plant. The air is very dry as well.

Plants are dried up in winter due to frost because (1) Evaporation does not take place (2) Photosynthesis does not take place at such low temperature (3) Respiration does not take place at low temperature (4) There is mechanical loss of tissues and drought condition prevails

Description : Plants are dried up in winter due to frost because (1) Evaporation does not take place (2) Photosynthesis does not take place at such low temperature (3) Respiration does not take place at low temperature (4) There is mechanical loss of tissues and drought condition prevails

Last Answer : There is mechanical loss of tissues and drought condition prevails

Plants are killed in winter by frost?

Description : Plants are killed in winter by frost?

Last Answer : because of desiccation and mechanical damage to the tissues

Water pipes in hilly areas often burst on a cold frosty night, because – (1) The material of which pipes are made contracts due to cold and so breaks (2) Water in the pipes freezes and on freezing water expands, so pipes break (3) Frost makes the pipes rusty, so they break (4) None of these

Description : Water pipes in hilly areas often burst on a cold frosty night, because – (1) The material of which pipes are made contracts due to cold and so breaks (2) Water in the pipes freezes and on freezing water expands, so pipes break (3) Frost makes the pipes rusty, so they break (4) None of these

Last Answer : (2) Water in the pipes freezes and on freezing water expands, so pipes break Explanation: The temperature may fall below 0° C during cold frosty nights which converts the water inside the pipes into ice, ... in an increase in volume. This exerts great force on the pipes and as a result, they burst.

Water pipes in hilly areas often burst on a cold frosty night, because (1) the material of which pipes are made contracts due to cold and so breaks (2) water in the pipes freezes and on freezing water expands, so pipes break (3) frost makes the pipes rusty, so they break (4) None of these

Description : Water pipes in hilly areas often burst on a cold frosty night, because (1) the material of which pipes are made contracts due to cold and so breaks (2) water in the pipes freezes and on freezing water expands, so pipes break (3) frost makes the pipes rusty, so they break (4) None of these

Last Answer : water in the pipes freezes and on freezing water expands, so pipes break

Pipelines in cold countries often burst in winter, because – (1) Water freezes and expands in its volume (2) Temperature of ice is less than that of water (3) Pipelines contract in their volume (4) Pipelines expand due to freezing

Description : Pipelines in cold countries often burst in winter, because – (1) Water freezes and expands in its volume (2) Temperature of ice is less than that of water (3) Pipelines contract in their volume (4) Pipelines expand due to freezing

Last Answer : (1) Water freezes and expands in its volume Explanation: Water expands on freezing. When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees ... it expands by approximately 9%. The fact that water expands upon freezing causes icebergs to float.

Pipelines in cold countries often burst in winter, because (1) water freezes and expands in its volume (2) temperature of ice is less than that of water (3) pipelines contract in their volume (4) pipelines expand due to freezing

Description : Pipelines in cold countries often burst in winter, because (1) water freezes and expands in its volume (2) temperature of ice is less than that of water (3) pipelines contract in their volume (4) pipelines expand due to freezing

Last Answer : water freezes and expands in its volume

Because they are resistant to desiccation (pron: des-ih-KA-shun), desert plants are known as what? a) dehydrates b) hydrophobocytes c) xerophytes d) none of the above

Description : Because they are resistant to desiccation (pron: des-ih-KA-shun), desert plants are known as what? a) dehydrates b) hydrophobocytes c) xerophytes d) none of the above

Last Answer : ANSWER: C -- XEROPHYTES

Why the bacterium Treponemapallidum is difficult to culture? A-.Because it requires a great deal of water to reproduce B- .Because it is unable to use carbohydrates as an energy source C- Because it lacks the genes needed for TCA cycle and oxidative phosphorylation D- Because it requires extremely low temperature at which water freezes

Description : Why the bacterium Treponemapallidum is difficult to culture? A-.Because it requires a great deal of water to reproduce B- .Because it is unable to use carbohydrates as an energy source ... TCA cycle and oxidative phosphorylation D- Because it requires extremely low temperature at which water freezes

Last Answer : Because it lacks the genes needed for TCA cycle and oxidative phosphorylation

Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because (A) Convection becomes important (B) Conduction becomes important (C) Radiation becomes important (D) Sub-cooled boiling occurs

Description : Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because (A) Convection becomes important (B) Conduction becomes important (C) Radiation becomes important (D) Sub-cooled boiling occurs

Last Answer : (C) Radiation becomes important

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 the crop production (b) It makes some soils impermeable (c) It raises the water table (d) It fills the air spaces in the soil with water

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)

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 production b. It may lead to crop yield loss c. It raises the water table d. It fills the air spaces in the soil with water

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

Where do the ducks go when the lagoon or lake freezes during winter?

Description : Where do the ducks go when the lagoon or lake freezes during winter?

Last Answer : Most ducks, geese, and cranes migrate to warmer climates as temps in their natural habitats drop, so by the time the lake is frozen, they've been long gone. That's why in the southern states, ... left Canada and the Northeastern U.S. and moved to the warmer gulf coast marshes, and other waterways.

will a bouganvilla that freezes back every winter ever bloom

Description : will a bouganvilla that freezes back every winter ever bloom

Last Answer : Need Answer

live in area code 29464. Is it too late to cut back oleanders. They look pretty bad due to repeat freezes this winter.

Description : live in area code 29464. Is it too late to cut back oleanders. They look pretty bad due to repeat freezes this winter.

Last Answer : Need Answer

Garlic freezes over the winter?

Description : I heard somewhere that garlic is being planted in the autumn, is that true?

Last Answer : Does not freeze

Will my orange tree come back. I think the frost partially killed.half of it but half still has green leaves

Description : Will my orange tree come back. I think the frost partially killed.half of it but half still has green leaves

Last Answer : Need Answer

what to do with frost killed amaranthus/summer poinsettia

Description : what to do with frost killed amaranthus/summer poinsettia

Last Answer : Need Answer

Frost has killed the leaves and flowers of my smoke bush. Should I prune the tree?

Description : Frost has killed the leaves and flowers of my smoke bush. Should I prune the tree?

Last Answer : Need Answer

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct? (a) Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate.(b) C3 plants respond to higher temperature with enhanced photosynthesis while C4 plants have much lower temperature optimum. (c) Tomato is a greenhouse crop which can be grown in CO2-enriched atmosphere for higher yield. (d) Light saturation for CO2 fixation occurs at 10% of full sunlight.

Description : With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct? (a) Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate. ( ... for higher yield. (d) Light saturation for CO2 fixation occurs at 10% of full sunlight.

Last Answer : (b) C3 plants respond to higher temperature with enhanced photosynthesis while C4 plants have much lower temperature optimum

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ? (1) Increasing atmospheric CO 2 concentration up to 0.05% can enhance CO 2 fixation rate (2) C 3 plants respond to higher temperatures with enhanced photosynthesis while C 4 plants have much lower temperature optimum (3) Tomato is a greenhouse crop which can be grown in CO 2 - enriched atmosphere for higher yield (4) Light saturation for CO 2 fixation occurs at 10% of full sunlight

Description : With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct ? (1) Increasing atmospheric CO 2 concentration up to 0.05% can enhance CO 2 fixation ... for higher yield (4) Light saturation for CO 2 fixation occurs at 10% of full sunlight

Last Answer : (2) C 3 plants respond to higher temperatures with enhanced photosynthesis while C 4 plants have much lower temperature optimum

Sucrose content in sugarcane decreases: [IAS 1993] (a) if frost occurs during the process of ripening (b) if high rainfall occurs during the period of growth of the plant (c) if there is high temperature during the time of ripening (d) if there is fluctuation in temperature during the period of growth of the plant

Description : Sucrose content in sugarcane decreases: [IAS 1993] (a) if frost occurs during the process of ripening (b) if high rainfall occurs during the period of growth of the plant (c) if there is high ... time of ripening (d) if there is fluctuation in temperature during the period of growth of the plant

Last Answer : Ans: (b)

Sucrose content in sugarcane decreases (1) if high rainfall occurs during the period of growth of the plant (2) if frost occurs during the period of ripening (3) if there is fluctuation in temperature during the period of growth of the plant (4) if there is high temperature during the time of ripening

Description : Sucrose content in sugarcane decreases (1) if high rainfall occurs during the period of growth of the plant (2) if frost occurs during the period of ripening (3) if there is fluctuation in temperature ... the period of growth of the plant (4) if there is high temperature during the time of ripening

Last Answer :  if frost occurs during the period of ripening

The surface of water in a pond remains cool even on a hot day because 1. water evaporates at the surface and evaporation causes cooling 2. the heat absorbed at the surface is transmitted downwards 3. Water in contact with the bottom of the pond becomes cool and rises to the surface due to convection Which of the above statements is/are correct? (a) 1 only (b) 3 only (c) 1 and 3 (d) 1, 2 and 3

Description : The surface of water in a pond remains cool even on a hot day because 1. water evaporates at the surface and evaporation causes cooling 2. the heat absorbed at the surface is transmitted downwards 3. Water in contact with the bottom ... /are correct? (a) 1 only (b) 3 only (c) 1 and 3 (d) 1, 2 and 3

Last Answer : Ans:(a)

When hot-water is sprinkled on a hotter glass tumbler, it breaks because – (1) glass suddenly expands (2) glass suddenly contracts (3) water evaporates (4) glass reacts chemically with water

Description : When hot-water is sprinkled on a hotter glass tumbler, it breaks because – (1) glass suddenly expands (2) glass suddenly contracts (3) water evaporates (4) glass reacts chemically with water

Last Answer : (2) glass suddenly contracts Explanation: If the poured liquid is relatively hotter or colder in comparison to the tumbler, it will break. When hot water is poured into a tumbler there is an uneven increase in the thermal expansion of the walls of the vessel.

When hot-water is sprinkled on a hotter glass tumbler, it breaks because (1) glass suddenly expands (2) glass suddenly contracts (3) water evaporates (4) glass reacts chemically with water

Description : When hot-water is sprinkled on a hotter glass tumbler, it breaks because (1) glass suddenly expands (2) glass suddenly contracts (3) water evaporates (4) glass reacts chemically with water

Last Answer : glass suddenly contracts

A little ether on the palm gives a cooling sensation because ether (a) is a cold liquid (b) evaporates (c) enters the pores of the skin (d) condenses on the palm

Description : A little ether on the palm gives a cooling sensation because ether (a) is a cold liquid (b) evaporates (c) enters the pores of the skin (d) condenses on the palm

Last Answer : Ans:(b)

Is the liquid propane in a barbecue evaporates away because the user left the valve open a chemical or physical change?

Description : Is the liquid propane in a barbecue evaporates away because the user left the valve open a chemical or physical change?

Last Answer : It's a physical change. Chemically, it's still propane - butit's physically changed from a liquid to a gas.

After long periods of use, a gray spot develops on the inside of a bulb. This is because of: A. The tungsten filament evaporates and collects there B. The heat of the bulb scorches the glass at the top C. Dust inside the bulb condenses on the top D. Glass undergoes a change due to the heat

Description : After long periods of use, a gray spot develops on the inside of a bulb. This is because of: A. The tungsten filament evaporates and collects there B. The heat of the bulb scorches the glass at the top C. Dust inside the bulb condenses on the top D. Glass undergoes a change due to the heat

Last Answer : ANSWER: A

After long periods of use, a grey spot develops on the inside of a bulb. This is because – (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Description : After long periods of use, a grey spot develops on the inside of a bulb. This is because – (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Last Answer : (3) dust inside the bulb condenses on the top Explanation: At high operating temperatures, tungsten evaporates from the filament and gradually forms a gray film on the inside of the bulb. The inert ... spot develops in the filament. When this happens, the filament will break and the bulb fails.

During hot weather, the fan produces a feeling of comfort. This is because – (1) fan supplies cool air (2) fan cools the air (3) our perspiration evaporates rapidly (4) conductivity of air increases

Description : During hot weather, the fan produces a feeling of comfort. This is because – (1) fan supplies cool air (2) fan cools the air (3) our perspiration evaporates rapidly (4) conductivity of air increases

Last Answer : (3) our perspiration evaporates rapidly Explanation: Fans make the air more comfortable for two reasons: (1) by moving the air, they blow away body heat and evaporate sweat, cooling the body, and (2) they also mix the cooler air near the floor with the warmer air by people's faces.

After long periods of use, a grey spot develops on the inside of a bulb. This is because (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Description : After long periods of use, a grey spot develops on the inside of a bulb. This is because (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat

Last Answer : dust inside the bulb condenses on the top

A substance that evaporates at room temperature is described as __________. What word completes the sentence?

Description : A substance that evaporates at room temperature is described as __________. What word completes the sentence?

Last Answer : Gas

Melting temperature of DNA is the temperature at which (A) Solid DNA becomes liquid (B) Liquid DNA evaporates (C) DNA changes from double helix into supercoiled DNA (D) Native double helical DNA is denatured

Description : Melting temperature of DNA is the temperature at which (A) Solid DNA becomes liquid (B) Liquid DNA evaporates (C) DNA changes from double helix into supercoiled DNA (D) Native double helical DNA is denatured

Last Answer : Answer : D

(3) prevents freezing of petrol Explanation: Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound widely used as an automotive antifreeze and a precursor to polymers. In its pure form, it is an odorless, colourless, syrupy, sweettasting liquid. Ethylene glycol is toxic, and ingestion can result in death. Due to its low freezing point ethylene glycol resists freezing. A mixture of 60% ethylene glycol and 40% water freezes at -45 degree C (- 49 degree F).

Description : (3) prevents freezing of petrol Explanation: Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound widely used as an automotive antifreeze and a precursor to polymers. In its pure form, it is ... A mixture of 60% ethylene glycol and 40% water freezes at -45 degree C (- 49 degree F).

Last Answer : Rust is - (1) A mixture of Fe₂O₃ and Fe(OH) ₂ (2) A mixture of FeO and Fe(OH)₂ (3) FeO only (4) A mixture of Fe₂O₃, 3H₂O and FeO

Refrigerators keep food unspoiled because – (1) at its low temperature, bacteria and moulds are inactive (2) at its low temperature, the germs are killed (3) at its low temperature, the germs are frozen (4) it sterilizes the food

Description : Refrigerators keep food unspoiled because – (1) at its low temperature, bacteria and moulds are inactive (2) at its low temperature, the germs are killed (3) at its low temperature, the germs are frozen (4) it sterilizes the food

Last Answer : (1) at its low temperature, bacteria and moulds are inactive Explanation: Bacteria and moulds find conditions of low pH, moisture, or temperature and high salt or sugar unfavorable for their ... a long time. Bacterial action is severely impaired at temperatures at or below 4 degree Celsius.

Refrigerators keep food unspoiled because (1) at its low temperature, bacteria and moulds are inactive (2) at its low temperature, the germs are killed (3) at its low temperature, the germs are frozen (4) it sterilises the food

Description : Refrigerators keep food unspoiled because (1) at its low temperature, bacteria and moulds are inactive (2) at its low temperature, the germs are killed (3) at its low temperature, the germs are frozen (4) it sterilises the food

Last Answer : at its low temperature, bacteria and moulds are inactive

The property of a substance to absorb moisture from the air on exposure is called------? A. osmosis B. deliquescence (Answer) C. efflorescence D. desiccation

Description : The property of a substance to absorb moisture from the air on exposure is called------? A. osmosis B. deliquescence (Answer) C. efflorescence D. desiccation

Last Answer : B. deliquescence (Answer)

Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus?

Description : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus?

Last Answer : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus? A. Yolk one B. Amnion C. Chorion D. Allantois.

Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus?

Description : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus?

Last Answer : Which extra-embryonic membrane in human prvents desiccation of the embryo inside the uterus? A. Yolk sac B. Amnion C. Chorion D. Allantois

Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus? (a) Yolk sac (b) Amnion (c) Chorion (d) Allantosis

Description : Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus? (a) Yolk sac (b) Amnion (c) Chorion (d) Allantosis

Last Answer : (b) Amnion

Why is a capsule advantageous to a bacterium? (a) It protects the bacterium from desiccation. (b) It provides means of locomotion. (c) It allows bacterium to “hide” from host’s immune system. (d) It allows the bacterium to attach to the surface.

Description : Why is a capsule advantageous to a bacterium? (a) It protects the bacterium from desiccation. (b) It provides means of locomotion. (c) It allows bacterium to “hide” from host’s immune system. (d) It allows the bacterium to attach to the surface.

Last Answer : c) It allows bacterium to “hide” from host’s immune system

A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called A.activationB.attenuation C.corepression D.desiccation

Description : A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called A.activation B.attenuation C.corepression D.desiccation

Last Answer : B.attenuation

Define desiccation with two example of Desiccants and draw a diagram of “ Desiccator”

Description : Define desiccation with two example of Desiccants and draw a diagram of “ Desiccator”

Last Answer : Definition: Desiccation is the process of complete removal of mechanically admixed water from substances. Examples of desiccants:  Silica, activated charcoal, calcium sulfate, calcium chloride, and molecular sieves. Diagram:

What does the term ‘Desiccation’’ mean?

Description : What does the term ‘Desiccation’’ mean?

Last Answer : Definition: Desiccation is the process of complete removal of mechanically admixed water from substances. Examples of desiccants: i. Dried Silica gel, ii. Phosphorous pentoxide iii. calcium sulfate, iv. Anhydrous calcium chloride, v. Conc. Sulphuric acid vi. Phosphorous trioxide

In biological studies, which of the following terms could be used to replace the word dehydration? a) encystation b) desiccation c) hydrolysis d) none of these

Description : In biological studies, which of the following terms could be used to replace the word dehydration? a) encystation b) desiccation c) hydrolysis d) none of these

Last Answer : ANSWER: B -- DESICCATION

The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Description : The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Last Answer : (1) molecular motion in a gas would cease Explanation: Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance.

The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Description : The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Last Answer : (1) molecular motion in a gas would cease Explanation: Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance.

The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Description : The absolute zero is a temperature at which ______. (1) molecular motion in a gas would cease (2) water freezes (3) all gases become liquid (4) all gases become solid

Last Answer : (1) molecular motion in a gas would cease Explanation: Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance. It is the point at which all motion in matter stops.

The absolute zero is a temperature at which - (1) Molecular motion in a gas would cease (2) Water freezes (3) All gases become liquid (4) All gases become solid

Description : The absolute zero is a temperature at which - (1) Molecular motion in a gas would cease (2) Water freezes (3) All gases become liquid (4) All gases become solid

Last Answer : (1) Molecular motion in a gas would cease Explanation: Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance. That temperature Molecular motion in a gas would cease.