Kuis Biologi Kelas VII Semester 2
Questions and Answers
- 1.
Satuan struktural dan fungsional terkecil mahluk hidup disebut
- A.
Kromosom
- B.
Jaringan
- C.
Gen
- D.
Sel
Correct Answer
D. SelExplanation
The correct answer is "Sel". In biology, the smallest structural and functional unit of living organisms is called a cell. Cells are the building blocks of life and perform various functions necessary for the survival of an organism. They contain genetic material, such as DNA, which carries the instructions for the organism's growth, development, and functioning. Cells also have specialized structures and organelles that carry out specific tasks, allowing them to perform their functions efficiently. Therefore, "Sel" is the correct answer as it refers to the smallest unit of life.Rate this question:
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- 2.
Perbedaan antara sel hewan dengan tumbuhan dapat dilihat dari
- A.
Dinding sel dan sentriol
- B.
Nukleus dan lisosom
- C.
Kloroplas dan nukleus
- D.
Sentriol dan lisosom
Correct Answer
D. Sentriol dan lisosomExplanation
The correct answer is "Sentriol dan lisosom." The difference between animal and plant cells can be seen in the presence of centrioles and lysosomes. Centrioles are found in animal cells but are absent in plant cells. They play a role in cell division and the organization of the cytoskeleton. Lysosomes, on the other hand, are present in animal cells but are rare in plant cells. They are responsible for intracellular digestion and the breakdown of waste materials. Therefore, the presence or absence of centrioles and lysosomes is a distinguishing factor between animal and plant cells.Rate this question:
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- 3.
Gen yang merupakan faktor keturunan terdapat dalam kromosom, sedangkan kromosom terdapat dalam
- A.
Nukleus
- B.
Lisosom
- C.
Ribosom
- D.
Badan golgi
Correct Answer
A. NukleusExplanation
Gen yang merupakan faktor keturunan terdapat dalam kromosom. Kromosom sendiri merupakan struktur yang terdapat dalam nukleus sel. Oleh karena itu, jawaban yang paling tepat adalah nukleus.Rate this question:
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- 4.
Sekumpulan semut di dalam lubang tanah membentuk
- A.
Individu
- B.
Populasi
- C.
Komunitas
- D.
Ekosistem
Correct Answer
B. PopulasiExplanation
The given question is asking about a group of ants living in a hole in the ground. The term "populasi" in Indonesian means "population" in English. A population refers to a group of individuals of the same species living in the same area at the same time. Therefore, the correct answer is "populasi" because it accurately describes the group of ants living in the hole.Rate this question:
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- 5.
Peranan pengurai dalam ekosistem adalah
- A.
Menghancurkan mineral
- B.
Mengubah mineral menjadi humus
- C.
Menguraikan senyawa organik
- D.
Menguraikan mineral dalam tanah
Correct Answer
C. Menguraikan senyawa organikExplanation
The correct answer is "Menguraikan senyawa organik" which means "Decomposing organic compounds." In an ecosystem, decomposers play a crucial role in breaking down dead organic matter such as plants and animals into simpler substances. This process releases nutrients back into the environment, allowing them to be recycled and used by other organisms. Decomposers like bacteria and fungi break down complex organic compounds into simpler forms, aiding in the nutrient cycle and maintaining the balance of the ecosystem.Rate this question:
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- 6.
Tanaman paku tanduk rusa yang menempel pada pohon – pohon sebagai tempat hidupnya disebut simbiosis
- A.
Mutualisme
- B.
Parasitisme
- C.
Komensalisme
- D.
Predatorisme
Correct Answer
C. KomensalismeExplanation
Komensalisme adalah hubungan simbiosis di mana satu organisme mendapatkan manfaat tanpa memberikan efek positif atau negatif pada organisme lainnya. Dalam contoh ini, tanaman paku tanduk rusa mendapatkan tempat hidup yang aman dan nyaman pada pohon, sementara pohon tidak mendapatkan manfaat atau kerugian dari keberadaan tanaman paku tersebut.Rate this question:
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- 7.
Perhatikan gambar ekosistem berikut ini! Gambar tersebut merupakan ekosistem
- A.
Stepa
- B.
Savana
- C.
Tundra
- D.
Taiga
Correct Answer
A. StepaExplanation
The correct answer is Stepa. The given options represent different types of ecosystems. Stepa refers to a grassland ecosystem found in Eurasia, characterized by dry grasses and few trees. Savana is a tropical grassland with scattered trees, Tundra is a cold, treeless biome found in the Arctic and Taiga is a coniferous forest found in high-latitude regions. Therefore, based on the options provided, the correct answer is Stepa as it represents a specific type of ecosystem.Rate this question:
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- 8.
Energi matahari sebelum sampai ke konsumen terlebih dahulu di simpan berupa makanan oleh
- A.
Tumbuhan
- B.
Hewan
- C.
Jamur
- D.
Bakteri
Correct Answer
A. TumbuhanExplanation
Sunlight is converted into food through the process of photosynthesis by plants. This food is then consumed by animals, fungi, and bacteria, which ultimately transfer the stored energy from the sun to the consumers. Therefore, the correct answer is "Tumbuhan" (plants) as they are the primary producers in the food chain and play a crucial role in storing solar energy in the form of food.Rate this question:
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- 9.
Larutan iodium untuk menguji hasil fotosintesis berupa
- A.
Protein
- B.
Karbohidrat
- C.
Lemak
- D.
Mineral
Correct Answer
B. KarbohidratExplanation
The correct answer is "Karbohidrat" because carbohydrates are the main product of photosynthesis. During photosynthesis, plants use sunlight, water, and carbon dioxide to produce glucose, which is a type of carbohydrate. Glucose is then used by plants as an energy source for growth and development, or it can be stored as starch for later use. Therefore, when testing the products of photosynthesis, the presence of carbohydrates, such as glucose or starch, can be detected using an iodine solution.Rate this question:
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- 10.
Peristiwa makan dan dimakan menurut urutan tertentu disebut
- A.
Rantai makanan
- B.
Jaring-jaring makanan
- C.
Siklus biogeokimia
- D.
Biomagnifikasi
Correct Answer
A. Rantai makananExplanation
The correct answer is "Rantai makanan." This is because a "rantai makanan" refers to the sequential process of organisms consuming and being consumed by other organisms in a specific order. It represents the transfer of energy and nutrients through different trophic levels in an ecosystem. This concept helps to understand the flow of energy and the interdependence of different species in a food web.Rate this question:
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- 11.
Kawasan yang berisi flora dan fauna langka disebut
- A.
Suaka margasatwa
- B.
Taman buru
- C.
Kebun raya
- D.
Cagar alam
Correct Answer
D. Cagar alamExplanation
Cagar alam adalah kawasan yang berisi flora dan fauna langka yang dilindungi oleh pemerintah. Di dalam cagar alam, flora dan fauna tersebut dapat hidup dan berkembang dengan aman tanpa terancam oleh aktivitas manusia. Cagar alam memiliki peran penting dalam melestarikan keanekaragaman hayati dan ekosistem alam.Rate this question:
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- 12.
Pencemaran udara oleh bahan pendingin ruangan disebabkan oleh suatu polutan berupa gas
- A.
CO2
- B.
CH4
- C.
CFC
- D.
NO2
Correct Answer
C. CFCExplanation
The correct answer is CFC because CFCs (chlorofluorocarbons) are known to be a major contributor to air pollution caused by cooling agents. CFCs are synthetic compounds that contain chlorine, fluorine, and carbon atoms. They are commonly used in refrigeration, air conditioning, and aerosol propellants. When released into the atmosphere, CFCs can deplete the ozone layer and contribute to global warming. Therefore, the presence of CFCs in room cooling agents can lead to air pollution.Rate this question:
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- 13.
Salah satu akibat yang timbul dari kepadatan penduduk yang tinggi terhadap sumber daya alam yang tersedia adalah
- A.
Air dan tempat tinggal makin sulit diperoleh
- B.
Makin banyaknya pohon – pohon yang ditanam
- C.
Terjaminnya keseimbangan rantai makanan
- D.
Iklim dan suhu stabil
Correct Answer
A. Air dan tempat tinggal makin sulit diperolehExplanation
One of the consequences of high population density on available natural resources is that it becomes increasingly difficult to obtain water and housing. As the population grows, the demand for these resources also increases, leading to scarcity and higher competition for access to them. This can result in limited availability of clean water and affordable housing options, making it more challenging for individuals to meet their basic needs.Rate this question:
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- 14.
Pembangunan apartemen di kota – kota besar dilakukan untuk mengatasi ketersediaan
- A.
Pangan
- B.
Lahan
- C.
Air bersih
- D.
Udara bersih
Correct Answer
B. LahanExplanation
The correct answer is "Lahan". The construction of apartments in big cities is done to address the availability of land. As cities become more populated and land becomes scarce, building apartments is a solution to accommodate more people in a limited space. This helps to optimize land usage and make housing more accessible in urban areas.Rate this question:
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- 15.
Gas berikut yang memiliki daya afinitas yang tinggi terhadap HB pada Sel darah merah dan dapat menyebabkan keracunan adalah
- A.
Hidrogen
- B.
Nitrogen
- C.
Karbonmonoksida
- D.
Karbon dioksida
Correct Answer
C. KarbonmonoksidaExplanation
Karbonmonoksida memiliki daya afinitas yang tinggi terhadap HB pada sel darah merah dan dapat menyebabkan keracunan. Karbonmonoksida (CO) merupakan gas beracun yang dihasilkan dari pembakaran bahan bakar fosil yang tidak sempurna. Ketika terhirup, CO akan terikat pada hemoglobin (HB) dalam sel darah merah dengan daya afinitas yang tinggi, menggantikan oksigen. Hal ini mengakibatkan kurangnya pasokan oksigen ke jaringan tubuh, menyebabkan keracunan yang dapat berakibat fatal.Rate this question:
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- 16.
Bagian sel yang merupakan pusat pengatur kegiatan dan perkembangan sel adalah
- A.
Lisosom
- B.
Ribosom
- C.
Mitokondria
- D.
Nukleus
Correct Answer
D. NukleusExplanation
The correct answer is Nukleus. The nucleus is the central control center of the cell, responsible for regulating all cellular activities and development. It contains the cell's genetic material, DNA, which carries the instructions for protein synthesis and cell functioning. The nucleus also plays a crucial role in cell division, as it is involved in the replication and distribution of DNA during mitosis and meiosis.Rate this question:
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- 17.
Vegetasi yang mengurangi tingkat abrasi adalah
- A.
Rumput
- B.
Pandan
- C.
Bakau
- D.
Kelapa
Correct Answer
C. BakauExplanation
Bakau adalah vegetasi yang dapat mengurangi tingkat abrasi. Bakau memiliki akar yang kuat dan berfungsi sebagai penahan tanah. Akar-akar ini membantu mengikat sedimen dan mengurangi erosi tanah akibat air atau angin. Selain itu, batang bakau yang tinggi juga dapat memecah kecepatan arus air, sehingga mengurangi kemungkinan terjadinya abrasi.Rate this question:
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- 18.
Jaringan yang berfungsi sebagai penghantar rangsang adalah
- A.
Otot
- B.
Rangka
- C.
Saraf
- D.
Kulit
Correct Answer
C. SarafExplanation
Saraf adalah jaringan yang berfungsi sebagai penghantar rangsang. Saraf mengirimkan sinyal-sinyal listrik dari bagian tubuh yang satu ke bagian tubuh yang lain. Hal ini memungkinkan tubuh untuk merasakan rangsangan dari lingkungan, seperti suhu, sentuhan, dan rasa sakit. Saraf juga berperan dalam mengirimkan sinyal-sinyal ke otot-otot agar dapat berkontraksi dan bergerak. Dengan demikian, saraf adalah jaringan yang penting dalam sistem saraf manusia.Rate this question:
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- 19.
Kelompok hewan Omnivora dibawah ini adalah
- A.
Tikus, babi dan kelinci
- B.
Tikus, ayam dan musang
- C.
Tikus, ayam dan babi
- D.
Ayam, babi dan sapi
Correct Answer
C. Tikus, ayam dan babiExplanation
The correct answer is Tikus, ayam, dan babi. These animals are classified as omnivores because they have the ability to consume both plants and animals as part of their diet. Tikus, ayam, dan babi are known to eat a variety of foods including grains, vegetables, fruits, insects, and small animals. They have adapted to have a diverse diet, allowing them to obtain the necessary nutrients for survival.Rate this question:
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- 20.
Pada air sungai yang telah tercemar akan terlihat tanda-tanda
- A.
Terjadi eutrofikasi
- B.
Warna air jernih
- C.
BOD rendah
- D.
Tidak berbau
Correct Answer
A. Terjadi eutrofikasiExplanation
The correct answer is "terjadi eutrofikasi". Eutrofikasi is a process in which excessive nutrients, such as nitrogen and phosphorus, enter a body of water, leading to an overgrowth of algae and other aquatic plants. This can cause the water to become cloudy or green in color and can result in decreased oxygen levels, leading to the death of aquatic organisms. Therefore, if a river water is polluted and shows signs of eutrofikasi, it means that there is an excessive amount of nutrients present in the water, causing an imbalance in the ecosystem.Rate this question:
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