SPM BIology 2015

Question

1 . Diagram 1.1 shows a terrestrial plant. Diagram 1.2 shows a cross section of the leaf of the plant.

Rajah 1.1 menunjukkan satu tumbuhan daratan. Rajah 1.2 menunjukkan keratan rentas daun tumbuhan tersebut.

(a)(i) Name the following structures:

Namakan struktur berikut:

(ii) Arrange R, S and T in the correct sequence to show the level of cell organisation.

Susunkan R, S dan T dalam urutan yang betul untuk menunjukkan aras organisasi sel.

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(b) Organelle R is found abundantly in cell S. Explain why.

Organel R terdapat dengan banyak di dalam sel S. Terangkan mengapa.

 

(c) Explain the function of tissue T.

Terangkan fungsi tisu T.

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(d) Diagram 1.3 shows on aquatic plant. Explain two adaptive features that enable the plant to live in its habitat.

Rajah 1.3 menunjukkan suatu tumbuhan akuatik. Terangkan dua ciri penyesuaian yang membolehkan tumbuhan itu hidup dalam habitatnya.

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Answer ( 1 )

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    2021-01-25T19:54:08+08:00

    1.a)i) Organelle R: chloroplast

    Cell S: palisade mesophyll cell

    Tissue T: xylem

    ii)R,S,T

     

    b)-palisade mesophyll cells have a large number of chloroplasts, allows for maximum sunlight absorption

    -sunlight is used in the process of photosynthesis

     

    c)-xylem is important in the transport of water and minerals from roots to the shoots of the plant.

    -provides the plant with mechanical strength and support

     

    d)Adaptation 1: have spongy tissues (aerenchyma tissues) which contain air spaces.

    Explanation 1: gives the plant buoyancy allowing it to float

    Adaptation 2: has strong and broad leaves

    Explantion 2: ensures that the leaves are not torn when water waves hit

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