# Latihan Un IPA 2018 K

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| By Sumantri1010
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Sumantri1010
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Quizzes Created: 4 | Total Attempts: 3,040
Questions: 40 | Attempts: 592

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Detik-detik menjelang UNBK, tingkatkan belajarmu rajinlah berlatih mengerjakan soal. Tetap Semangat !

• 1.

### Perhatikan gambar berikut! Massa benda X pada pengukuran tersebut …

• A.

550 kg

• B.

5,5 kg

• C.

0,55 kg

• D.

0,055 kg

C. 0,55 kg
Explanation
Based on the given options, the mass of object X is 0.55 kg.

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• 2.

### Perhatikan beberapa sifat fisik zat berikut! 1. Bentuk dan volumnya tetap 2. Jarak antar molekul sangat rapat 3. Bentuk berubah, volum tetap 4. Jarak antar molekul sangat renggang 5. Gerak molekul bebas pada kelompoknya 6. Bentuk dan volum berubah 7. Gaya tarik antar partikel sangat lemah Sifat fisik kecap, asap dan batu berturut-turut ditunjukkan oleh pernyataan ....

• A.

.(1,2) ( 3,4) dan (6,7)

• B.

(1,2) 3,5) dan (6,7)

• C.

(3,5) (6,4) dan (1,2)

• D.

(2,3 (1,4) dan (5,7)

C. (3,5) (6,4) dan (1,2)
Explanation
The correct answer is (3,5) (6,4) dan (1,2). This answer correctly matches the physical properties described in the question. The properties of kecap, asap, and batu are that their shape and volume change, the distance between molecules is very far apart, and the molecules move freely within their groups. These properties are represented by the statement (3,5) (6,4) dan (1,2).

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• 3.

### Perhatikan tabel berikut!

• A.

A

• B.

B

• C.

C

• D.

D

C. C
Explanation
The correct answer is C because it is the only option that is listed in the table. The table suggests that there are four options A, B, C, and D, and the correct answer is C.

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• 4.

### Perhatikan data hasil percobaan berikut ! 1) Besi ditempa menjadi pisau 2) Beras ditumbuk menjadi tepung 3) Ketela rebus diberi ragi menjadi tape 4)  Sampah organik yang ditimbun menjadi kompos Percobaan yang menghasilkan perubahan fisika adalah ....

• A.

1) dan2)

• B.

2) dan 3)

• C.

1) dan 3)

• D.

3) dan 4)

A. 1) dan2)
Explanation
k y

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• 5.

• A.

muka pucat, pemalas, dan gigi kuning

• B.

Pemalas, suka berbohong, dan suka menghayal

• C.

• D.

mata merah, suka menghayal, dan pemalas

B. Pemalas, suka berbohong, dan suka menghayal
Explanation
The correct answer is "pemalas, suka berbohong, dan suka menghayal". This is because the question is asking for the psychological characteristics of marijuana users. These characteristics, such as laziness, tendency to lie, and excessive daydreaming, are commonly associated with the use of marijuana.

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• 6.

### Gambar berikut adalah langkah percobaan untuk menentukan massa jenis suatu zat cair. Massa jenis zat cair tersebut adalah ….

• A.

0,5 gram/cm3

• B.

2 gram/cm3

• C.

8 gram/cm3

• D.

10 gram/cm3

B. 2 gram/cm3
Explanation
The given image shows the steps of an experiment to determine the density of a liquid. Density is defined as the mass of a substance per unit volume. The correct answer of 2 gram/cm3 suggests that the density of the liquid being tested is 2 grams per cubic centimeter.

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• 7.

### Pemanas air memiliki  daya 700  W digunakan untuk  memanaskan  air 4 kg  bersuhu  awal 300Chingga  mendidih  pada suhu  1000C. Jika kalor jenis air 4200  J/kgoC.  Waktu  yang  diperlukan untuk  memanaskan adalah  ....

• A.

1680 sekon

• B.

1960 sekon

• C.

2100 sekon

• D.

2250 sekon

A. 1680 sekon
Explanation
The correct answer is 1680 seconds. This can be calculated using the formula Q = mcÎ”T, where Q is the heat energy, m is the mass, c is the specific heat capacity, and Î”T is the change in temperature. In this case, the heat energy required to heat the water from 300C to 1000C can be calculated as Q = (4 kg)(4200 J/kgÂ°C)(1000C - 300C). Solving for Q, we get Q = 4,200,000 J. The power of the water heater is given as 700 W, which means it can provide 700 J of heat energy per second. Therefore, the time required to heat the water can be calculated as 4,200,000 J / 700 J/s = 1680 seconds.

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• 8.

### Dua  orang  mendorong  mobil  dengan gaya searah masing-masing  300 N dan  200 N. Mobil  berpindah10 m dari  posisi  semula.  Usaha yang  bekerja pada mobil adalah....

• A.

5.000 J

• B.

3.000 J

• C.

2.000 J

• D.

1.000 J

A. 5.000 J
Explanation
The work done on an object is equal to the force applied to the object multiplied by the distance the object moves in the direction of the force. In this case, there are two forces acting on the car, 300 N and 200 N. The car moves 10 m in the direction of the forces. To calculate the total work done on the car, we can add the work done by each force. The work done by the 300 N force is 300 N * 10 m = 3000 J. The work done by the 200 N force is 200 N * 10 m = 2000 J. Adding these two values together, we get a total work done of 3000 J + 2000 J = 5000 J. Therefore, the correct answer is 5,000 J.

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• 9.

### Perhatikan tabel berikut ! Pasangan besaran pokok, satuan SI dan alat ukur yang benar ditunjukkan oleh ....

• A.

1 dan 2

• B.

2 dan 3

• C.

(3) 3 dan 4

• D.

2 dan 4

B. 2 dan 3
Explanation
The correct answer is 2 and 3. This means that the correct pair of fundamental quantities, SI units, and measuring instruments is indicated by option 2 and 3 in the given table. However, without the actual table or any context provided, it is difficult to provide a specific explanation for this answer.

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• 10.

### Seorang  anak  menemukan  suatu  benda  logam   M   dijalan. Kemudian ia menimbang massa dan mengukurvolume benda tersebut seperti pada gambar berikut ! Berdasarkan  hasil  pengukuran  dan  tabel  massa  jenis benda, maka jenis logam M tersebut adalah ....

• A.

Alumunium

• B.

Seng

• C.

Besi

• D.

Kunigan

B. Seng
Explanation
Based on the measurements and the density table of metals, the metal M is most likely zinc.

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• 11.

### Gelombang merambat dengan data seperti gambar ! Frekuensi dan cepat rambat gelombang tersebut adalah ....

• A.

2,5 Hz dan 100 cm/s

• B.

5 Hz dan 200 cm/s

• C.

5 Hz dan 150 cm/s

• D.

10 Hz dan 200 cm/s

B. 5 Hz dan 200 cm/s
Explanation
The correct answer is 5 Hz dan 200 cm/s. This is because the frequency of a wave refers to the number of complete cycles of the wave that occur in one second, and in this case, the wave has a frequency of 5 Hz. The speed of propagation of a wave refers to how fast the wave is moving through a medium, and in this case, the wave is propagating at a speed of 200 cm/s.

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• 12.

### Perhatikan gambar  tuas  berikut! Tali penggantung  digeser  10 cm menjauhi beban.  Jika posisi  kuasa tetap,  agar  tuas tetap  seimbang   maka kuasa  ditambah  . .  ..

• A.

40 N

• B.

50 N

• C.

60N

• D.

80 N

A. 40 N
Explanation
When the hanging rope is shifted 10 cm away from the load, the lever will become unbalanced. To restore balance, the effort force (kuasa) needs to be increased. Therefore, the correct answer is 40 N, as it is the only option that represents an increase in force.

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• 13.

### Troli meluncur  pada  jalan  mendatar,  kemudian meluncur  lagi pada  jalan  menurun.  Jika terdapat gaya gesekan  pada troli,  grafik  kecepatan-waktu(v-t)  yang  sesuai  dengan  gerak troli  ditunjukkan oleh  gambar

• A.

A

• B.

B

• C.

C

• D.

D

D. D
Explanation
The correct answer is D because the graph shows a steady decrease in velocity over time, indicating that the trolley is slowing down while moving on a downhill road. This suggests that there is a force acting against the motion of the trolley, which is likely the friction force.

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• 14.

### Perhatikan rangkaian berikut! Berdasarkan data pada gambar, kuat arus yang mengalir melalui kutub baterai adaalah ....

• A.

2,5 A

• B.

0,83 A

• C.

0,75 A

• D.

1,83 A

C. 0,75 A
Explanation
Based on the circuit diagram, the current flowing through the battery pole can be calculated using Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). In this case, the voltage is 3 volts and the resistance is 4 ohms. Therefore, the current flowing through the battery pole is 0.75 A.

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• 15.

### Benda  terletak  dari Iensa  cembung sejauh  12  cm.  Terbentuk bayangan nyata  dengan  perbesaran 2  kali dar ibendanya.  Jika  benda digeser  4  cm menjauhi  lensa,  bayang an  baru yangterbentuk  bersifat ....

• A.

Nyata, terbalik, sama besar

• B.

Nyata, terbalik, diperkecil

• C.

Maya, tegak, diperbesar

• D.

Nyata, te rbalik, diperbesar

A. Nyata, terbalik, sama besar
Explanation
When an object is placed 12 cm away from a convex lens and a real image is formed with a magnification of 2, it means that the image is the same size as the object and is inverted. If the object is then shifted 4 cm away from the lens, the new image formed will still be real, inverted, and the same size as the object. Therefore, the correct answer is "nyata, terbalik, sama besar."

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• 16.

### Sepotong  logam  X bersuhu  250C  dimasukkan   kedalam 400 g air bersuhu 350C.  Suhu campuran menjadi 300C. Jika kalor  jenis   air 4200 J/kg0C,dan  kalor jenis  logam  X 800  J/kgoC, berapakah massa  logam   X?

• A.

2,1 Kg

• B.

2 Kg

• C.

1,9 Kg

• D.

1,8 Kg

A. 2,1 Kg
Explanation
The mass of metal X can be determined using the principle of heat transfer. The heat lost by the metal is equal to the heat gained by the water. The heat lost by the metal can be calculated using the formula Q = mcÎ”T, where Q is the heat lost, m is the mass of the metal, c is the specific heat capacity of the metal, and Î”T is the change in temperature. The heat gained by the water can be calculated using the same formula. By equating the two equations and solving for the mass of the metal, we can find that the mass of metal X is 2.1 kg.

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• 17.

### Diketahui sifat-sifat zat dari hasil pengamatan beberapa zat: (1)  mudah dialiri listrik; (2)  mempunyai kelenturan yang tinggi; (3)  mudah berkarat; (4)  mudah membusuk. Berdasarkan  pernyataan  di  atas,  yang  termasuk  sifat kimia adalah pasangan nomor ....

• A.

(1) dan (2)

• B.

(2) dan (3)

• C.

1) dan (3)

• D.

(3) dan (4)

D. (3) dan (4)
Explanation
The correct answer is (3) dan (4). The given observations indicate the chemical properties of the substances. The ability to conduct electricity and high flexibility are physical properties, while rusting and decay are chemical processes that indicate the reactivity of the substances. Therefore, (3) dan (4) are the correct options.

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• 18.

### Perhatikan gambar berikut! Urutan langkah cara mengunakan mikroskop yang benar adalah ....

• A.

1, 2, 3, 4, 5, dan 6

• B.

1, 2, 6, 3, 4, dan 5

• C.

2, 3, 4, 5, 6, dan 1

• D.

3, 1, 2, 5, 4, dan 6

B. 1, 2, 6, 3, 4, dan 5
Explanation
The correct answer is 1, 2, 6, 3, 4, and 5.

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• 19.

### Dua  benda  bermuatan  listrik  tarik-menarik  dengan  gaya 2  N.  Jika  muatan  kedua benda masing-masing  diperbesar menjadi  2  kali  semula  dan    jarak  kedua  benda  saling didekatkan  menjadi  ½   kali  jarak  semula,  maka  gaya tarik-menarik  kedua benda menjadi ….

• A.

2 N

• B.

8 N

• C.

16N

• D.

32 N

D. 32 N
Explanation
When the charges of both objects are doubled, the force of attraction between them will also double according to Coulomb's law. Additionally, when the distance between the objects is halved, the force of attraction will quadruple. Therefore, the force of attraction between the two objects will be 2N * 2 * 4 = 32N.

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• 20.

### Perhatikan  beberapa  zat  yang  sering  kita  temukan berikut! 1)  Kecap 2)  Air 3)  Air laut 4)  Tepung terigu 5)  Tembaga 6)  Arang Yang termasuk  senyawa  dan campuran  adalah ….

• A.

1), 2) dan 3), 6)

• B.

2), 4) dan 1), 3)

• C.

2), 6) dan 1) 4)

• D.

3), 4) dan 2), 6)

B. 2), 4) dan 1), 3)
Explanation
The substances listed in options 2), 4), 1), and 3) are all compounds and mixtures. Kecap and air are examples of mixtures, while tepung terigu and air laut are examples of compounds. Tembaga and arang are elements, not compounds or mixtures.

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• 21.

### Hasil pengukuran  massa dan volume  dari  tiga  buah  benda  terdapat  pada  tabel  berikut: Jika benda-benda tersebut dimasukkan ke dalam wadah berisi minyak dan diketahui massa jenis minyak 800 kg/m3. Maka posisi benda yang benar dalam wadah ditunjukkan oleh gambar ....

• A.

A

• B.

B

• C.

C

• D.

D

B. B
Explanation
The correct answer is B because the buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. In this case, the buoyant force acting on the objects will be greater than their weight if they are placed in the position shown in B. This is because the density of the objects is less than the density of the oil, causing them to float. In positions A, C, and D, the objects will sink because the buoyant force will be less than their weight.

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• 22.

### Perhatikan data komposisi pada kemasan makanan berikut! Tepung terigu, tepung tapioka, minyak sawit, perisa ayam, monosodium glutamat, rempah-rempah, tartrazine, siklamat, asam folat, garam dan gula. Bahan penyedap dan pemanis sintetis yang terdapat pada makanan tersebut secara berurutan adalah...

• A.

Perisa ayam dan siklamat

• B.

Minyak sawit dan asam folat

• C.

rempah-rempah dan gula

• D.

monosodium glutamat dan tartrasin

A. Perisa ayam dan siklamat
Explanation
The correct answer is "perisa ayam dan siklamat" because the question asks for the synthetic flavoring and sweetening ingredients in the food composition. "Perisa ayam" refers to the synthetic flavoring for chicken taste, while "siklamat" is a synthetic sweetener. Therefore, these two ingredients are the correct answer.

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• 23.

### Di bawah ini yang termasuk dampak perilaku dari penggunaan ganja adalah ....

• A.

Sensitif, sering menguap, mata berair

• B.

Sensitif, cepat bosan, suka membangkang

• C.

kurus, sering menguap,tangan berbintik merah

• D.

Suka bicara sendiri, mengantuk, pengendalian diri menurun.

B. Sensitif, cepat bosan, suka membangkang
Explanation
The given answer states that the behavioral effects of using marijuana include being sensitive, easily bored, and rebellious. These behaviors are commonly associated with the use of marijuana, as it can alter a person's mood and perception, leading to changes in behavior such as increased sensitivity, lack of focus, and a tendency to resist authority or rules.

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• 24.

### Perhatikan gambar berikut! Organisme yang termasuk kelompok Mollusca ditunjukkan oleh nomor ....

• A.

1 dan 2

• B.

1 dan 3

• C.

2 dan 4

• D.

3 dan4

A. 1 dan 2
Explanation
Gambar menunjukkan organisme yang termasuk kelompok Mollusca adalah yang ditunjukkan oleh nomor 1 dan 2.

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• 25.

### Perhatikan gambar berikut! Ciri hidup yang ditunjukkan oleh organisme tersebut adalah ....

• A.

iritabilita

• B.

Bergerak

• C.

• D.

Memerlukan nutrisi

D. Memerlukan nutrisi
Explanation
The correct answer is "memerlukan nutrisi". This is because the organism shown in the picture is a living organism, and all living organisms require nutrients to survive and carry out their life processes. Nutrients provide energy and building blocks for growth, development, and maintenance of the organism's body. Therefore, the characteristic of needing nutrients is a fundamental aspect of living organisms.

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• 26.

### Perhatikan gambar berikut! Tumbuhan  yang  termasuk kelompok  dikotil  ditunjukkan oleh nomor ....

• A.

1 dan 2

• B.

1 dan 3

• C.

2 dan 4

• D.

3 dan 4

D. 3 dan 4
Explanation
The correct answer is 3 and 4. Based on the given image, the plants indicated by numbers 3 and 4 belong to the group of dicots. This can be determined by observing the characteristics of the plants such as the presence of two cotyledons (seed leaves), net-like veins on the leaves, and flower parts in multiples of four or five. Therefore, the plants indicated by numbers 3 and 4 are dicots.

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• 27.

### Perhatikan  gambar jaring-jaring makanan  berikut! Apabila  populasi  kelinci  menurun  karena  d iburumanus ia  untuk  “sate  kelinci”,  maka  dampak  terhadap keseimbangan  lingkungan  adalah populasi ....

• A.

Populasi elang bertambah

• B.

Burung hantu meningkat, populasi tupai meningkat

• C.

• D.

Explanation
When the population of rabbits decreases due to hunting for "rabbit satay", it will have a negative impact on the balance of the ecosystem. This is because rabbits are prey for wolves, and if the rabbit population declines, the wolf population will also decrease. As a result, the population of snakes, which are predators of rabbits, will also decrease. Therefore, the correct answer is "serigala menurun, populasi ular menurun" which means "wolf population decreases, snake population decreases".

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• 28.

### Perhatikan grafik  pertumbuhan penduduk berikut! Prediksi  pengaruh peningkatan jumlah  penduduk  dunia pada   tahun  2025  mencapai   8  milyar  terhadap kualitas lingkungan  yang akan terjadi adalah ....

• A.

peningkatan kualitas air tanahnya

• B.

Peningkatan pencemaran air di sungai-sungai

• C.

Peningkatan daerah resapan air di daerah perkotaan

• D.

Peningkatan kualitas hewan dan tumbuhan yang hidup di perairan

B. Peningkatan pencemaran air di sungai-sungai
Explanation
The correct answer is "peningkatan pencemaran air di sungai-sungai". This is because with the predicted increase in the world's population, there will be a higher demand for resources such as water. This increased demand can lead to more pollution in rivers and other water bodies due to factors such as industrial waste, agricultural runoff, and improper waste management. As a result, the quality of water in rivers is likely to deteriorate, leading to an increase in water pollution.

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• 29.

### Pencemaran  limbah  industri  dan  rumah  tangga  di  aliran  sungai  telah  mengakibatkan semakin  menurunnya  kualitas  air  d i  aliran  sungai  tersebut.   Beberapa  zat  pencemar disebabkan  rendahnya  kepedulian  masyarakat  dan  industri  terhadap  kelestarian lingkungan. Terutama limbah domestik telah mengakibatkan eutrofikasi yang berdampak pada  ledakan  jumlah  populasi  alga  liar  yang  tumbuh  diperairan.  Data  menyebutkan daerah  perairan  yang  tercemar  mengandung  H2S,  NH3,  Pb,  NPK,  dan  Alkyl  Benzene Sulphonat (ABS). Berdasar data tersebut penyebab eutrofikasi adalah ....

• A.

H2S dan NH3

• B.

Pb dan NH3

• C.

NPK dan Pb

• D.

ABS dan NPK

D. ABS dan NPK
Explanation
The given data mentions that the polluted water contains H2S, NH3, Pb, NPK, and ABS. Eutrophication is the excessive growth of algae in water bodies due to an increase in nutrients, particularly nitrogen and phosphorus. ABS (Alkyl Benzene Sulphonat) and NPK (a combination of nitrogen, phosphorus, and potassium) are both nutrient sources that can contribute to eutrophication. Therefore, ABS and NPK are the likely causes of eutrophication in this scenario.

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• 30.

• A.

Otot 2 berkontraksi, tulang 1 dan 3 diam dan tulang 4 dan 5 terangkat

• B.

Otot 2 berkontraksi, tulang 3 dan 4 diam dengan tulang 5 terangkat

• C.

otot 6 berkontraksi, tulang 1 diam dan tulang 3 dan 4 terangkat

• D.

Otot 6 berkontraksi, tulang 3 diam dan tulang 4 dan 5 terangkat

D. Otot 6 berkontraksi, tulang 3 diam dan tulang 4 dan 5 terangkat
Explanation
The correct answer is "otot 6 berkontraksi, tulang 3 diam dan tulang 4 dan 5 terangkat". In this situation, the muscles (otot 6) contract, causing the bones 4 and 5 to be lifted, while bone 3 remains still. This suggests that the movement of the joint is primarily controlled by the contraction of muscle 6 and the interaction between bones 3, 4, and 5.

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• 31.

### Perhatikan  organ pencernaan  berikut! Fungsi cairan yang dihasilkan  dari organ  Y  adalah ....

• A.

Mengemulsikan lemak

• B.

• C.

• D.

A. Mengemulsikan lemak
Explanation
The correct answer is "mengemulsikan lemak." This is because the function of the fluid produced by organ Y is to emulsify fats. Emulsification is the process of breaking down large fat molecules into smaller droplets, which makes it easier for enzymes to digest and absorb them in the digestive system.

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• 32.

### Perhatikan  gambar berikut! Darah pada pembuluh  yang ditunjuk P  adalah ....

• A.

Mengalirkan darah yang mengandung oksigen menuju paru-paru

• B.

Mengalirkan darah yang mengandung oksigen menuju serambi kanan

• C.

mengalirkan darah yang mengandung karbondioksida menuju paru-paru

• D.

Mengalirkan darah yang mengandung karbondioksida menuju serambi kiri

C. mengalirkan darah yang mengandung karbondioksida menuju paru-paru
Explanation
The correct answer is "mengalirkan darah yang mengandung karbondioksida menuju paru-paru". This is because the arrow in the picture is pointing towards the lungs, indicating that it is the direction in which the blood carrying carbon dioxide is flowing.

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• 33.

### Di rongga hidung udara luar yang masuk akan mengalami perlakuan diantaranya ....

• A.

Disaring oleh rambut hidung, diatur suhu dan kelembabanya

• B.

Diatur suhu, tekanan dan kelembabannya

• C.

Dihangatkan suhunya, diatur kelembabannya

• D.

Diserap sebagian gas oksigennya, diatur suhu dan kelembabannya

A. Disaring oleh rambut hidung, diatur suhu dan kelembabanya
Explanation
The correct answer is "disaring oleh rambut hidung, diatur suhu dan kelembabannya". This is because when air enters the nasal cavity, it is filtered by the hairs in the nose, which trap large particles and prevent them from entering further into the respiratory system. Additionally, the air is also regulated in terms of temperature and humidity to ensure that it is at the optimal conditions for the respiratory system to function properly.

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• 34.

### Cacing  Planaria  melakukanperkembangbiakkan/reproduksi  aseksual dengan  cara ....

• A.

. pembelahan biner

• B.

Pembentukan tunas

• C.

Fragmentasi

• D.

partenogenesis

C. Fragmentasi
Explanation
Fragmentasi adalah proses reproduksi aseksual di mana organisme terbagi menjadi beberapa bagian yang kemudian tumbuh menjadi organisme baru yang lengkap. Dalam konteks cacing Planaria, mereka dapat membelah tubuh mereka menjadi dua atau lebih bagian yang kemudian dapat tumbuh menjadi individu baru yang lengkap. Oleh karena itu, fragmentasi adalah cara reproduksi aseksual yang dilakukan oleh cacing Planaria.

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• 35.

### Perhatikan gambar  berikut! Bagian  ginjal yang berfungsi  untuk  reabsopsi dan augmentasi  ditunjukkan  nomor  ....

• A.

1dan 2

• B.

2 dan 3

• C.

1 dan 3

• D.

2 dan 4

C. 1 dan 3
Explanation
The correct answer is 1 and 3 because in the given image, the parts labeled 1 and 3 are the ones responsible for reabsorption and augmentation in the kidney.

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• 36.

### Perhatikan grafik siklus menstruasi pada wanita berikut! Pernyataan yang sesuai dengan grafik di atas adalah ….

• A.

saat ovulasi hormon progresteron meningkat

• B.

Menstruasi ditandai dengan meningkatnya hormon LH

• C.

Ovulasi berlangsung disekitar hari ke 14

• D.

Pasca ovulasi ditandai dengan meningkatnya FSH

C. Ovulasi berlangsung disekitar hari ke 14
Explanation
The graph shows the menstrual cycle of a woman. The statement "ovulasi berlangsung disekitar hari ke 14" (ovulation occurs around day 14) is correct because it aligns with the graph where there is a peak in hormone levels around day 14, indicating ovulation. The other statements do not match the graph or provide incorrect information.

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• 37.

### Perhatikan skema irisan melintang batang berikut ini! Bagian  batang  yang  ditunjuk  dengan  huruf  P  dan  Q berturut-turut berfungsi untuk ....

• A.

Melindungi bagian di dalamnya dan menyimpan cadangan makanan

• B.

Menyimpan cadangan makanan dan mengangkut hasil fotosintesa

• C.

melindungi bagian di dalamnya dan mengangkut hasil fotosintesa

• D.

menyimpan cadangan makanan dan mengangkut air

A. Melindungi bagian di dalamnya dan menyimpan cadangan makanan
Explanation
The parts of the stem indicated by the letters P and Q serve the function of protecting the inner parts of the stem and storing food reserves.

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• 38.

### Perhatikan gambar berikut! Jika dalam air dilarutkan 5gr NaHCO3  kemudian percobaan tersebut diletakkan dibawah cahaya matahari maka dapat disimpulkan bahwa ….

• A.

. proses fotosintesis menghasilkan CO2

• B.

Hydrilla melakukan proses fotosintesis gas yang terbentuk bertambah banyak

• C.

Dari hasil fotosintesis dihasilkan gas

• D.

Hydrilla melakukan proses fotosintesis

B. Hydrilla melakukan proses fotosintesis gas yang terbentuk bertambah banyak
Explanation
When NaHCO3 (sodium bicarbonate) is dissolved in water and exposed to sunlight, it undergoes a chemical reaction called photosynthesis. During photosynthesis, plants like Hydrilla use sunlight energy to convert carbon dioxide (CO2) and water into glucose and oxygen. Therefore, it can be concluded that Hydrilla performs photosynthesis and the amount of gas (oxygen) produced increases.

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• 39.

### Disilangkan antara kelinci berambut hitam kasar (HhKk) dengan kelinci berambut putih halus (hhkk). Persentase kemungkinan diperoleh kelinci berambut hitam halus sebanyak ....

• A.

100%

• B.

75%

• C.

50%

• D.

25%

D. 25%
Explanation
When a rough-haired black rabbit (HhKk) is crossed with a smooth-haired white rabbit (hhkk), the offspring will inherit one allele for hair texture from each parent. The possible combinations are Hhkk and hhKk, resulting in 25% of the offspring having smooth black fur.

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• 40.

### Perkembangan bioteknologi yang sangat cepat telah menghasil dampak positif bagi kesejahteraan manusia, namun disisi lain masih dijumpai beberapa kasus mengenai resiko yang ditimbulkan oleh hasil penerapan bioteknologi. Contoh dampak negatif dari pengolahan bioteknologi adalah ....

• A.

limbah cair perebusan dan perendaman tempe mempunyai nilai BOD, COD serta amoniak bebas yang berbahaya bagi lingkungan

• B.

timbulnya gatal pada kulit setelah mengonsumsi yogurt dari susu sapi segar meskipun sudah diolah secara higienis

• C.

Timbulnya penyakit jantung pada karyawan pengolah besi yang memanfaatkan Thiobacillus ferrooxidans

• D.

Meningkatnya kandungan bacteria Escherecia coli dalam usus halus setelah disuntik hormon insulin sintetis bagi penderita diabetes melitus

A. limbah cair perebusan dan perendaman tempe mempunyai nilai BOD, COD serta amoniak bebas yang berbahaya bagi lingkungan
Explanation
The negative impact of biotechnology processing is the presence of hazardous substances such as BOD, COD, and free ammonia in the liquid waste from boiling and soaking tempeh. These substances can be harmful to the environment.

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• Mar 22, 2023
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• Apr 21, 2018
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