SPM Biology 2016

Question

1 . Diagram 1.1 shows a cross section of dicotyledonous stem.

Rajah 1.1 menunjukkan keratan batang dikotiledon.

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(a)(i) Name the level of organisation of X.

Namakan peringkat organisasi bagi X.

(ii) Name structure P, Q and R.

Namakan struktur P, Q dan R.

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(b) Structure P is the outermost layer of X. Explain the characteristic of P.

Struktur P adalah lapisan paling luar bagi X. Terangkan ciri P.Cher Questions Solution Bank Rumusan Jawapan SPM & IGCSE Questions Answers Solution

(c)(i) Name two tissues that form structure Q which involved in transportation.

Namakan Dua tisu yang membentuk struktur Q yang terlibat dalam pengangkutan.

(ii) Diagram 1.2 shows a part of a stem of the tree where the ring of bark has been removed. Predict the condition at S and T after on month.
Rajah 1.2 menunjukkan bahagian batang pokok itu yang gelang kulitnya telah dibuang. Ramalkan keadaan pada S dan T selapas satu bulan.

(iii) Explain your prediction at S.

Terangkan ramalan anda pada S.

 

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Answer ( 1 )

    1
    2021-01-06T10:41:55+08:00

    1.a)i) Organ

    ii) P: Epidermis

    Q: Vascular bundle

    R: Pith

     

    b) -A single layer of compact cells.

    -Cells do not have much space in between them.

    -Thick waxy cuticle covers the outer layer of P.

     

    c) i) Xylem and phloem

    ii) S: enlarges, increases in diameter

    T: decreases in diameter

    iii) -The phloem tissue is removed.

    -Organic substances like glucose would accumulate at the top of the ring of bark removed, causing it to increase in diameter as glucose is not transported to the roots.

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