P2 Kedah Essay

8/8/2019 P2 Kedah Essay

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SULIT

4551/2 2010 Hak Cipta PKPSM Kedah Lihat halaman Sebelah

17

Section B

Bahagian B

[ 40 marks]

[ 40 markah]

Answer any two questions from this section

Jawab mana-manadua soalan daripada bahagian ini.

6 (a) Diagram 6.1 shows some examples of variation in human.

Rajah 6.1 menunjukkan beberapa contoh variasi pada manusia.

(a)

(b)

(c)

(d)

Diagram 6.1

Rajah 6.1


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(i) Based on Diagram 6.1, state the examples of continuous variation and

discontinuous variation.

Berdasarkan rajah 6.1 nyatakan contoh-contoh bagi variasi selanjar dan variasi tak

selanjar

[2 marks][2 markah]

(ii) State four differences between continuous variation and discontinuous variation.

Nyatakan empat perbezaan antara variasi selanjar dan variasi tak selanjar.

[ 4 marks][ 4 markah]

(b) Diagram 6.2 (a) and (b) show two examples of hereditary diseases.

Rajah 6.2 (a) dan (b) menunjukkan dua contoh penyakit keturunan .

AlbinismeAlbino

(a)

Normal red blood cell Sickleshaped red blood cellSel darah merah normal Sel darah merah berbentuk sabit

(b)

Diagram 6.2Rajah 6.2

Explain one characteristic of each disease.

Terangkansatu ciri bagi setiap penyakit tersebut.

[4 marks][4 markah]


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(c) Diagram 6.3 shows an experiment to show the differences between two ginger plants

which is obtained from tissue culture and are planted in two different environments.

Rajah 6.3 menunjukkan satu ekperimen bagi menunjukkan perbezaan dua pokok halia yang

diperolehi daripada kultur tisu dan ditanam dalam dua persekitaran yang berbeza.

Plantlet is planted in the open ground

(loam soil), spaced 30 cm apart and

exposed to bright sunlight. The plantlet

is watered on alternate days.

Anak pokok ditanam di tanah lapang (tanah

gembur) berjarak 60 cm antara anak pokok

dan terdedah kepada cahaya yang terang

dan disiram air selang sehari.

Plantlet is planted in flower pots (sandy

loam soil), spaced 10 cm apart and place

under the tree shade. The plantlet is

watered on alternate days.

Anak pokok ditanam dalam pasu bunga

(tanah gembur berpasir),berjarak 10 cm

sesame anak pokok, diletak di bawah

teduhan pokok. Disiram air selang sehari.

Set A Set B


(i) Explain the abiotic factors that cause the differences between the two ginger plants in set

A and set B. [ 8 marks ]Terangkan faktor abiotik yang menyebabkqn perbezaan di antara dua pokok halia dalam set A

dan set B

(ii) Explain the role of tissue culture in this experiment. [ 2 marks ]

Terangkan peranan kultur tisu dalam eksperimen ini.

A piece of tissue is takenfrom the parent plant.Kepingan tisu diambil dari

pokok induk.

Plantlets

Anak pokok

Tissue Cultured

Dijalan kultur tisu

Plantlets

Anak pokok


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7. (a) Diagram 7.1 shows the structure of a synapse.

Rajah 7.1 menunjukkan struktur sinaps.

Diagram 7.1

Rajah 7.1

Explain how the nerve impulse is transmitted across the synapse.

Terangkan bagaimana impuls saraf diangkut melalui sinaps

[ 6 marks ]

[6 markah]

(b) Diagram 7.2 shows a reflex action that involves neurone X and Y.

Rajah 7.2 menunjukkan arka refleks yang melibatkan neuron X dan Y.

Diagram 7.2

Diagram 7.2

Describe the reflex action.

Huraikan tindakan refleks ini.

[4 marks]

[4 markah]

(c) When a man is chased by a fierce dog, he is experiencing 'fight or flight' situation.

Explain how the nervous system and the endocrine system of the man coordinate to

respond to this situation.

Apabila seorang lelaki dikejar oleh seekor anjing, dia mengalami situasi lawan atau lari.

Terangkan bagaimana sistem saraf dan sistem endokrin lelaki dikoordinasikan untuk respon

terhadap situasi ini.

[10 marks ][ 10 markah]

impulses


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8 (a) Diagram 8.1 shows a fish.

Rajah 8.1 menunjukkan seekor ikan.

(i) State two adaptations of the fish on how to reduce the resistance in water .

Nyatakan dua adaptasi pada ikan untuk mengurangkan rintangan dalam air.

[ 2 marks ][ 2 markah]

(ii) Explain the role of body muscle in the mechanisms of locomotion in fish.

Terangkan peranan otot badan dalam mekanisma pergerakan ikan


(b) Diagram 8.2 shows a forearm of humans.

Rajah 8.2 menunjukkan lengan atas manusia.

Joint S Joint TSendi S Sendi T


(i) Explain the similarity and difference between joint S and T.

Terangkan persamaan dan perbezaan antara sendi S dan Sendi T.


(ii) Osteoporosis is a bone disorder. Arthritis cause painful joint.

Explain the condition of osteoporosis and arthritis respectively.

Osteoporosis ialah sejenis penyakit tulang. Arthritis menyebabkan sakit pada

sendi tulang. Terangkan secara berasingan keadaan dalam osteoporosis dan

arthritis.

[ 4 marks ][4 markah]

Muscle / Otot

Scales / sisik


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9 (a) Diagram 9.1 shows the information relating to the campaign of recycling

practice.Rajah 9.1 menunjukkan maklumat berkenaan kempen amalan kitar semula.

Diagram 9.1 Rajah 9.1

Based on the given information, explain how recycle practice able to preserve

the balance of environment.

Berdasarkan maklumat yang diberi, terangkan bagaimana amalan kitar semula

dapat mengekalkan keseimbangan alam sekitar.

[10 marks]

(b) Diagram 9.2 shows a large area of forest involved in the building of a dam.Rajah 9.2 menunjukkan satu kawasan hutan yang besar telah terlibat dalam pembinaan

sebuah empangan


Discuss the good and bad economical and environmental effects of this

development.

Bincangkan kesan baik dan buruk dari segi ekonomi dan alam persekitaran bagi

pembangunan ini.

[10 marks]

Kertas Soalan Tamat

P2 Kedah Essay

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