$CATEGORY: Science - Khan Academy/6.Life Processes/6.Life Processes--Transportation

//Multiple Choice

Xylem is responsible for the transport of\: {
    ~Food
    =Water and minerals
    ~Oxygen
    ~Hormones
}

Which part of the plant is responsible for most of the transpiration? {
    ~Stem
    ~Roots
    =Leaves
    ~Flowers
}

The loss of water vapor from the aerial parts of a plant is called\: {
    ~Translocation
    ~Photosynthesis
    =Transpiration
    ~Respiration
}

The process of transpiration mainly occurs through\: {
    ~Root hairs
    ~Xylem vessels
    =Stomata
    ~Phloem
}

Which of the following factors affects the rate of transpiration? {
    ~Temperature
    ~Humidity
    ~Wind speed
    =All of the above
}

The pressure developed due to transpiration that helps in the upward movement of water is called\: {
    ~Root pressure
    =Transpiration pull
    ~Capillary action
    ~Osmotic pressure
}

The component of xylem responsible for water conduction is\: {
    ~Xylem parenchyma
    ~Xylem fibers
    =Xylem vessels
    ~Phloem
}

Which of the following statements about transpiration is true? {
    ~It increases with high humidity
    =It helps in cooling the plant
    ~It occurs only at night
    ~It is not affected by wind speed
}

The opening and closing of stomata are controlled by\: {
    =Guard cells
    ~Xylem vessels
    ~Phloem cells
    ~Root hairs
}

Which of the following statements is incorrect? {
    ~Xylem transports water and minerals
    ~Transpiration occurs through stomata
    =Xylem transports food in plants
    ~Transpiration helps in water movement
}

//True or False

Xylem transports food in plants. {F}

Transpiration helps in cooling the plant. {T}

The rate of transpiration decreases with an increase in temperature. {F}

Guard cells control the opening and closing of stomata. {T}

Transpiration pull is responsible for the upward movement of water in plants. {T}

Transpiration occurs only during the night. {F}

High humidity increases the rate of transpiration. {F}

Xylem vessels and tracheids help in water conduction. {T}

Phloem is responsible for the transport of water. {F}

Wind speed affects the rate of transpiration. {T}

//Fill in the blanks

Xylem transports _____ from roots to leaves. {
    ~food
    =water and minerals
    ~carbon dioxide
    ~None of the above
}

Transpiration occurs mainly through _____. {
    ~roots
    =leaves
    ~stems
    ~None of the above
}

The cells that control the opening and closing of stomata are called _____. {
    =guard cells
    ~xylem cells
    ~phloem cells
    ~None of the above
}

The upward movement of water in plants is due to _____. {
    ~transpiration pull
    ~root pressure
    =both a and b
    ~None of the above
}

Transpiration mainly occurs through tiny pores called _____. {
    ~lenticels
    =stomata
    ~root hairs
    ~None of the above
}

High humidity in the air _____ the rate of transpiration. {
    ~increases
    =decreases
    ~has no effect on
    ~None of the above
}

Xylem consists of vessels, tracheids, xylem fibers, and _____. {
    =xylem parenchyma
    ~phloem
    ~root hairs
    ~None of the above
}

The process of loss of water from plants in the form of vapor is called _____. {
    ~translocation
    =transpiration
    ~respiration
    ~None of the above
}

Transpiration helps in maintaining the _____ balance in plants. {
    ~carbon
    =water
    ~nitrogen
    ~None of the above
}

The process that helps plants absorb water from the soil is called _____. {
    ~diffusion
    =osmosis
    ~evaporation
    ~None of the above
}

//Numericals

A plant transpires 50 mL of water in 5 hours. What is the transpiration rate per hour? {
    =10 mL/hr
    ~5 mL/hr
    ~15 mL/hr
    ~20 mL/hr
}

If a plant loses 200 mL of water in 4 hours, what is the transpiration rate? {
    =50 mL/hr
    ~100 mL/hr
    ~25 mL/hr
    ~75 mL/hr
}

A leaf loses 300 mL of water in 6 hours. How much water does it lose per minute? {
    =1 mL/min
    ~2 mL/min
    ~3 mL/min
    ~5 mL/min
}

A plant transpires 500 mL of water in 10 hours. What is the transpiration rate per hour? {
    ~25 mL/hr
    =50 mL/hr
    ~100 mL/hr
    ~10 mL/hr
}

A tree loses 1.2 liters of water through transpiration in 6 hours. What is the transpiration rate per minute? {
    ~0.2 mL/min
    ~2 mL/min
    =3.3 mL/min
    ~5 mL/min
}

//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Xylem -> Transports water and minerals
=Stomata -> Pores for transpiration
=Transpiration -> Loss of water as vapour
=Guard cells -> Control stomatal opening
}


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