Respiration takes placce in ? Explain your answer .

Respiration takes placce in (Explain your answer .)

(1) cuticle of leaf

(2)xylem vessels

(3)bones

(4)enamel of tooth

(5)retina of the eye

A.(3),(5)

B.(1),(2),(4)

C.(1),(3),(5)

D.(2),(3),(4)

3 個解答

評分
  • 1 十年前
    最愛解答

    The answer is C. (1), (3) and (5) only.

    It is because cuticle of leaf, bones and retina of the eye contains living tissues and living cells. So, they have to take in oxygen and take out respiration. This releases energy for living.

    Please be noted that bones will grow. So it is a living tissue.

    Xylem vessels are made of dead cells. So no respiration takes place there. And this choice is a wrong one.

    Enamel of the tooth is made of minerals and organic compounds. However, it is not a living tissue. So, no respiration takes places.

    資料來源: Myself~~~
  • 1 十年前

    Does respiration really take place in cuticle which is non-living??

    In fact, cuticle is just the waxy substances secreted by the epidermal cells.

    How can it carry out respiration?

  • 1 十年前

    The ans should be A

    only 3 and 5

    如樓上所言

    2 and 5 are composed of dead cells

    thus no respiration takes place

    However cuticle of leaf are also made up of inorganic compound

    therefore 1 is a wrong ans

    所以ans係A

    2007-06-25 11:16:03 補充:

    let me make an amendment2 is composed of dead cells 4 is composed of mineral saltnot 5

    資料來源: 自己
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