1.
Katak dewasa bernafas dengan menggunakan ....
Correct Answer
A. Paru-paru
Explanation
Adult frogs breathe using their lungs. Lungs are the organs responsible for the exchange of gases (oxygen and carbon dioxide) in vertebrates, including amphibians like frogs. The lungs of frogs are located in their chest cavity and are well-developed in adult frogs. When frogs breathe, they inhale air through their nostrils, which then travels to their lungs for gas exchange. Therefore, the correct answer is "Paru-paru" (lungs).
2.
Gangguan pencernaan pada manusia berupa sering buang air besar adalah ....
Correct Answer
A. Diare
Explanation
The correct answer is Diare because it is a condition characterized by frequent bowel movements, loose or watery stools, and abdominal pain. It is a common digestive disorder caused by various factors such as viral or bacterial infections, food poisoning, or certain medications. Diare can lead to dehydration and electrolyte imbalances if not treated promptly.
3.
Pada proses pernafasan dada pada manusia ketika udara dihirup maka ....
Correct Answer
A. Tulang rusuk terangkat dan rongga dada membesar
Explanation
During the process of chest respiration in humans, when air is inhaled, the ribs are lifted and the chest cavity expands. This allows more space for the lungs to expand and fill with air.
4.
Enzim amilase pada usus halus berfungsi untuk ....
Correct Answer
C. Menghancurkan zat tepung menjadi gula
Explanation
The correct answer is "Menghancurkan zat tepung menjadi gula." This is because the enzyme amylase in the small intestine is responsible for breaking down complex carbohydrates, such as starch, into simple sugars, such as glucose. This process is known as hydrolysis and allows for the absorption of glucose into the bloodstream for energy.
5.
Gerakan menarik makanan yang terjadi di kerongkongan dinamakan gerakan ....
Correct Answer
B. Peristaltik
Explanation
Peristaltik is the correct answer because it refers to the rhythmic contractions of the muscles in the esophagus that help push food down into the stomach. This movement is responsible for the process of swallowing and moving food through the digestive system. Percernaan, Hidrolik, and Kimiawi are not appropriate answers as they do not accurately describe the specific movement of food in the esophagus.
6.
Alur peredaran darah besar yang benar adalah sebagai berikut ....
Correct Answer
D. Jantung (bilik kiri) - seluruh tubuh - jantung (serambi kanan)
Explanation
The correct answer is "Jantung (bilik kiri) - seluruh tubuh - jantung (serambi kanan)". This is because the left ventricle of the heart pumps oxygenated blood to the entire body through the systemic circulation. The oxygenated blood then returns to the right atrium of the heart through the superior and inferior vena cava, and enters the right ventricle before being pumped to the lungs for oxygenation.
7.
Perhatikan pohon-pohon di bawah ini!
i) Mangga
ii) Kentang
iii) Bambu
iv) Apel
v) Durian
Tumbuhan di atas yang menyimpan cadangan makanannya pada buah adalah ....
Correct Answer
C. i , iv , v
Explanation
The correct answer is i, iv, v. The explanation is that mango, apple, and durian are fruits that store their food reserves in the fruit itself. Kentang (potato) and bambu (bamboo) are not fruits and do not store their food reserves in the fruit. Therefore, the correct answer is i, iv, v.
8.
Berikut adalah golongan darah yang dimiliki manusia adalah ....
Correct Answer
C. A, B, AB, dan O
Explanation
The correct answer is A, B, AB, dan O. This is because these are the four main blood types that humans can have. Blood type A has the A antigen on its red blood cells, blood type B has the B antigen, blood type AB has both A and B antigens, and blood type O has neither A nor B antigens. These blood types are important for blood transfusions and determining compatibility between donors and recipients.
9.
Berikut yang tidak dibutuhkan ketika fotosintesis adalah ...
Correct Answer
B. Oksigen
Explanation
Oksigen tidak dibutuhkan dalam proses fotosintesis karena oksigen adalah salah satu produk samping dari fotosintesis. Fotosintesis adalah proses di mana tumbuhan menggunakan sinar matahari, karbondioksida, dan air untuk menghasilkan glukosa dan oksigen. Oksigen yang dihasilkan oleh tumbuhan selama fotosintesis kemudian dilepaskan ke udara sebagai produk samping. Oleh karena itu, oksigen bukanlah salah satu bahan yang dibutuhkan dalam proses fotosintesis.
10.
Pembuluh darah yang mengalirkan darah bersih dari jantung menuju ke seluruh tubuh adalah ....
Correct Answer
C. Pembuluh nadi
Explanation
Pembuluh nadi adalah pembuluh darah yang mengalirkan darah bersih dari jantung menuju ke seluruh tubuh. Pembuluh kapiler adalah pembuluh darah yang menghubungkan arteri dan vena, dan berperan dalam pertukaran zat antara darah dan jaringan tubuh. Pembuluh vena adalah pembuluh darah yang mengalirkan darah kotor dari tubuh kembali ke jantung. Pembuluh balik tidak ada dalam sistem peredaran darah.
11.
Tumbuhan yang memiliki cadangan makanan pada umbi adalah ....
Correct Answer
C. Singkong, talas, ketela dan bawang merah
Explanation
Plants that have food reserves in their tubers are cassava, taro, sweet potato, and shallots.
12.
Beruang kutub dapat terlindung dari cuaca dingin karena memiliki ....
Correct Answer
C. Lapisan lemak dan bulu tebal
Explanation
Polar bears are able to withstand cold weather because they have a thick layer of fat, known as blubber, which acts as insulation and helps to retain body heat. Additionally, they have a dense fur coat that provides further insulation and keeps them warm in freezing temperatures. This combination of thick blubber and dense fur allows polar bears to survive in their icy habitat.
13.
Penyesuaian diri makhluk hidup terhadap lingkungan dinamakan....
Correct Answer
D. Adaptasi
Explanation
Adaptasi adalah penyesuaian diri makhluk hidup terhadap lingkungan. Makhluk hidup memiliki kemampuan untuk beradaptasi dengan perubahan lingkungan agar dapat bertahan hidup. Adaptasi dapat berupa perubahan perilaku, struktur tubuh, atau sifat-sifat fisik lainnya yang memungkinkan makhluk hidup berinteraksi dengan lingkungannya. Dengan beradaptasi, makhluk hidup dapat memanfaatkan sumber daya yang tersedia dan menghindari bahaya yang ada dalam lingkungannya.
14.
Bentuk paruh yang dimiliki burung menyesuaikan ....
Correct Answer
C. Jenis makanannya
Explanation
The shape of a bird's beak is adapted to the type of food it eats. Different bird species have different beak shapes that allow them to efficiently capture and consume their preferred food sources. For example, birds with long, thin beaks are often adapted for probing into flowers to extract nectar, while birds with short, strong beaks are adapted for cracking open seeds or nuts. Therefore, the correct answer is "jenis makanannya" or "the type of food it eats."
15.
Unta mempunyai punuk di punggungnya yang berguna untuk ....
Correct Answer
A. Menyimpan cadangan makanan dan air
Explanation
The correct answer is "Menyimpan cadangan makanan dan air." This is because the hump on a camel's back is a reservoir of fat, which can be converted into energy and water when the camel is in a scarcity of food and water. This adaptation allows camels to survive in arid environments where food and water are scarce.
16.
Kemampuan bunglon merubah warna tubuhnya disebut ...
Correct Answer
C. Mimikri
Explanation
Mimikri adalah kemampuan bunglon untuk mengubah warna tubuhnya agar serupa dengan lingkungannya. Hal ini memungkinkan bunglon untuk menyesuaikan diri dengan latar belakangnya dan bersembunyi dari predator atau mencari mangsa dengan lebih efektif. Autotomi adalah kemampuan hewan untuk melepaskan atau memutuskan sebagian tubuhnya sebagai mekanisme pertahanan. Ekolokasi adalah kemampuan beberapa hewan untuk menggunakan suara untuk menavigasi dan mencari makanan. Reboisasi adalah proses menanam kembali pohon-pohon di daerah yang sebelumnya telah ditebangi.
17.
Berikut ini adalah ciri-ciri yang dimiliki tumbuhan teratai adalah ....
Correct Answer
B. Memiliki daun tipis dan lebar
Explanation
The correct answer is "Memiliki daun tipis dan lebar." This is because the lotus plant, which is a type of water lily, is known for having thin and wide leaves. These leaves allow the plant to float on the water's surface and absorb sunlight for photosynthesis. The other options, such as having thorny leaves or long pinnate leaves, do not accurately describe the characteristics of a lotus plant.
18.
Fungsi paruh bebek yang lebar dan tipis adalah ....
Correct Answer
A. Menyaring makanan dari air
Explanation
The wide and thin beak of a duck is adapted for filtering food from water. This type of beak allows ducks to strain small organisms and plants from the water, such as insects, algae, and seeds. The beak acts as a sieve, allowing water to pass through while trapping food particles. This adaptation helps ducks obtain their necessary nutrients from their aquatic environment.
19.
Semua benda yang ada di alam ini meliputi tiga wujud yaitu ...
Correct Answer
D. Cair, padat dan gas
Explanation
The correct answer is "Cair, padat dan gas". This is because the question is asking for the three forms of matter that exist in nature. The three forms of matter are solid (padat), liquid (cair), and gas (gas). Therefore, the answer "Cair, padat dan gas" correctly identifies these three forms of matter.
20.
Perubahan benda cair menjadi padat dinamakan ....
Correct Answer
A. Membeku
Explanation
The correct answer is "Membeku" because it refers to the process of a liquid substance changing into a solid state due to a decrease in temperature.
21.
Berikut ini adalah contoh dari peristiwa menyublim adalah ....
Correct Answer
D. Kapur barus yang lama-lama habis
Explanation
Kapur barus yang lama-lama habis dapat dijelaskan sebagai contoh dari peristiwa menyublim karena kapur barus dapat berubah langsung dari fase padat menjadi fase gas tanpa melewati fase cair terlebih dahulu.
22.
Perubahan benda yang dapat kembali ke bentuk asalnya dinamakan ....
Correct Answer
C. Perubahan sementara
Explanation
The correct answer is "Perubahan sementara". This is because the term "perubahan sementara" refers to temporary changes, which means that the object can return to its original form after undergoing the change. This suggests that the object undergoes a reversible transformation, where it can revert back to its original state.
23.
Buah yang busuk akan mengalami perubahan pada hal-hal berikut, kecuali ....
Correct Answer
D. Namanya
Explanation
The question asks for something that will not change when a fruit is rotten. When a fruit is rotten, its smell, color, and shape will change. However, its name will remain the same regardless of its condition.
24.
Proses perkaratan bisa terjadi saat besi terkena ....
Correct Answer
B. Air hujan
Explanation
The process of rusting occurs when iron is exposed to moisture, specifically water. Water contains oxygen and other impurities that react with the iron, causing it to corrode and form rust. Therefore, the correct answer is "Air hujan" which translates to "rainwater" in English.
25.
Air yang berubah menjadi uap air (gas) dapat kembali menjadi air jika ....
Correct Answer
B. Didinginkan
Explanation
When water is heated, it changes into steam or vapor. On the other hand, when steam or vapor is cooled, it condenses back into water. Therefore, the correct answer is "Didinginkan" which means "cooled" in English.