gas exchange

gas exchange
16問 • 2年前
  • charish
  • 通報

    問題一覧

  • 1

    Plants obtain the gases they need through their

    leaves

  • 2

    The pumping organ for transportation of blood

    heart

  • 3

    The sound of heart caused by contraction and relax- ation of heart muscles.

    heartbeat

  • 4

    The circulatory fluid; con- sists of RBCs, WBCs, plate- lets and plasma

    blood

  • 5

    Tubular structures that carry blood; three types- arteries, veins and capil- laries

    blood vessel

  • 6

    Throbbing caused by flow of blood in arteries.

    pulse

  • 7

    1. Which of these is the correct equation for photosynthesis? a. carbon dioxide + water → glucose + oxygen b. glucose + oxygen → carbon dioxide + water c. carbon dioxide + glucose → water + oxygen

    c

  • 8

    2. Which gas is released when plant cells respire aerobically? a. Oxygen b. Carbon dioxide c. Nitrogen

    b

  • 9

    3. When does respiration happen in plants? a. All the time b. Only during the day c. Only during the night

    a

  • 10

    There is an overall uptake of carbon dioxide and release of oxygen by a plant under certain conditions. Which statement about such a plant is correct? a. Respiration is happening faster than photosynthesis b. Photosynthesis and respiration are happening at the same rate c. Photosynthesis is happening faster than respiration

    c

  • 11

    How do plants obtain the carbon dioxide they need for photosynthesis? a. By osmosis b. By diffusion c. By active transport.

    b

  • 12

    6. Which of these is an adaptation of leaves for efficient gas exchange? a. Tightly packed spongy mesophyll cells b. A waxy cuticle on the upper surface of the leaf c. Tiny pores, called stomata, in the lower epidermis

    c

  • 13

    What colour would hydrogencarbonate indicator be at high concentrations of carbon dioxide? a. Purple b. Red c. Yellow

    b

  • 14

    When is the movement of carbon dioxide, oxygen and water vapour at the surface of the leaf likely to be greatest? a. When the stomata are open b. When the stomata are closed c. When it is cool and humid

    a

  • 15

    What happens to stomata in the light? a. Their guard cells absorb water by osmosis, become turgid and the stomata open b. Their guard cells absorb water by osmosis, become flaccid and the stomata close c. Their guard cells lose water by osmosis, become turgid and the stomata open

    a

  • 16

    Net gas exchange from a leaf can be investigated using hydrogencarbonate indicator in a stoppered tube. Why might one of the test leaves be boiled first? a. To see if high temperatures increase the rate of photosynthesis and respiration b. To show that a leaf has to be alive for it to affect the amount of carbon dioxide in the tube c. To remove the waxy cuticle so that gas exchange can happen more quickly

    b

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    問題一覧

  • 1

    Plants obtain the gases they need through their

    leaves

  • 2

    The pumping organ for transportation of blood

    heart

  • 3

    The sound of heart caused by contraction and relax- ation of heart muscles.

    heartbeat

  • 4

    The circulatory fluid; con- sists of RBCs, WBCs, plate- lets and plasma

    blood

  • 5

    Tubular structures that carry blood; three types- arteries, veins and capil- laries

    blood vessel

  • 6

    Throbbing caused by flow of blood in arteries.

    pulse

  • 7

    1. Which of these is the correct equation for photosynthesis? a. carbon dioxide + water → glucose + oxygen b. glucose + oxygen → carbon dioxide + water c. carbon dioxide + glucose → water + oxygen

    c

  • 8

    2. Which gas is released when plant cells respire aerobically? a. Oxygen b. Carbon dioxide c. Nitrogen

    b

  • 9

    3. When does respiration happen in plants? a. All the time b. Only during the day c. Only during the night

    a

  • 10

    There is an overall uptake of carbon dioxide and release of oxygen by a plant under certain conditions. Which statement about such a plant is correct? a. Respiration is happening faster than photosynthesis b. Photosynthesis and respiration are happening at the same rate c. Photosynthesis is happening faster than respiration

    c

  • 11

    How do plants obtain the carbon dioxide they need for photosynthesis? a. By osmosis b. By diffusion c. By active transport.

    b

  • 12

    6. Which of these is an adaptation of leaves for efficient gas exchange? a. Tightly packed spongy mesophyll cells b. A waxy cuticle on the upper surface of the leaf c. Tiny pores, called stomata, in the lower epidermis

    c

  • 13

    What colour would hydrogencarbonate indicator be at high concentrations of carbon dioxide? a. Purple b. Red c. Yellow

    b

  • 14

    When is the movement of carbon dioxide, oxygen and water vapour at the surface of the leaf likely to be greatest? a. When the stomata are open b. When the stomata are closed c. When it is cool and humid

    a

  • 15

    What happens to stomata in the light? a. Their guard cells absorb water by osmosis, become turgid and the stomata open b. Their guard cells absorb water by osmosis, become flaccid and the stomata close c. Their guard cells lose water by osmosis, become turgid and the stomata open

    a

  • 16

    Net gas exchange from a leaf can be investigated using hydrogencarbonate indicator in a stoppered tube. Why might one of the test leaves be boiled first? a. To see if high temperatures increase the rate of photosynthesis and respiration b. To show that a leaf has to be alive for it to affect the amount of carbon dioxide in the tube c. To remove the waxy cuticle so that gas exchange can happen more quickly

    b