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 CH 5 MODEL ANSWERS G6

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Mr_Abdulrahman

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Posts : 42
Join date : 2010-01-28

PostSubject: CH 5 MODEL ANSWERS G6   Tue Feb 09, 2010 5:40 am

1) Choose the correct answer :

  • ……………….transports water from roots to stems then leaves

    a)xylem b) phloem c) epidermis d) bark


  • The outer layer in roots is ……………………….

    a)xylem b) phloem c) epidermis d) bark
  • ……………………carries sugar from leaves to stems and roots

    a)xylem b) phloem c) epidermis d) bark


  • In………………………process , the plant traps the sunlight energy to make sugars

    a)photosynthesis b) cellular respiration c) transpiration d) digestion
  • …………………….may be soft(green)or woody

    a)stems b) roots c)leaves d)flowers
  • ………………..plants grow their stems every year

    a)deciduous b)green c) herbaceous d) herbivores


  • Which one of the following is different from the others?

    a)trees b) shrubs c) vines d) poppies
  • The openings in the plant leaves are called ………………………

    a)xylem b) phloem c) stomata d) guard cells
  • The loss of water through its leaf is called…………………..
    a)photosynthesis b) cellular respiration c) transpiration d) digestion


  • Which one of the following is not a condition for photosynthesis to occur?

    a)oxygen b) carbon dioxide c) water d) sunlight


  • The photosynthesis occurs only in the green parts that are called……..…..

    a)chlorides b) chlorophyll c) leaf d) mitochondria
  • at night, the plant gets its need of energy by …………………..process

    a)photosynthesis b) cellular respiration c) transpiration d) digestion
  • In cellular respiration, the plant takes ………………….from the air

    a)oxygen b) carbon dioxide c) water d) sunlight


  • During the day, …………………gas is the input for the plant

    a)oxygen b) carbon dioxide c) carbon monoxide d) nitrogen


  • cellular respiration and photosynthesis are …………………….

    a)the same b) happening at night c) opposite d) parallel

    2)Rewrite the following sentences in the right way:

    1) Stomata exist mostly in the upper epidermis of the stem

    ……………………………………………………………………………………………………………leaf………………………………………………………………………………………………………………………………………

    2) Water goes up through the phloem because of the cellular respiration process

    …………………………………………………………………xylem………………………………………………………………………………………………………………………………………………………………………………

    3) The tubers as white potato are roots with no definite function for the plant

    ………………………stems have…a function that they store food for the plant when it needs in cold or little rain ………………………………………………………………………………

    4) The taproots are branched to get more gases

    ………………………plants having a root system ……….........water………………………………..



    3) give the scientific reason for each of the following:
  • the roots have hair-like structures


to increase the surface area of water absorption

  • the leaf has a spongy layer of cells with spaces between them


to let gases pass easily among the cells

  • water helps stomata to open and close during the day


when the guard cells are filled with water, their shape becomes curved , causing the stomata to open, and vise- versa

  • the input for plants is the output for animals and vise-versa


because IN the photosynthesis ,during the day, the plants take carbon dioxide from air that the animals give it out during respiration , so, carbon dioxide is the input for the plant and at the same time it is the output for animals



5)Write down three ideas using the following words:

(carbon dioxide – water – oxygen – chlorophyll –sugars – leaf – cellular respiration – photosynthesis – mitochondria – energy – carbon dioxide .oxygen cycle – sunlight –plant –air -soil)

1. The plant takes carbon dioxide from air and water from the soil in presence of chlorophyll to trap sunlight energy and make sugars for the plant in its leaf.

2. cellular respiration and photosynthesis are opposite processes

3. In carbon dioxide-oxygen cycle, carbon dioxide is input for the plant, at the same time, oxygen is output



8. Draw and label a cross section in a plant's root or stem:


http://www3.0zz0.com/2010/02/08/21/997719031.jpg
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