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Berkembang biak adalah salah satu ciri makhluk hidup yang berfungsi untuk mencegah kepunahan. Dengan berkembang biak, makhluk hidup dapat menghasilkan keturunan baru dan memperluas populasi mereka. Hal ini penting untuk menjaga kelangsungan hidup suatu spesies, karena jika suatu spesies tidak mampu berkembang biak, populasi mereka dapat menurun secara drastis dan mengarah pada kepunahan.

A mistar is a tool used to measure length or distance. It is a long, straight, and flat ruler-like instrument with markings or divisions on it. By aligning one end of the mistar with the starting point and measuring up to the desired point, one can accurately determine the length of an object or distance between two points. A mistar is commonly used in various fields such as construction, engineering, and design for precise measurements.

The resultant of two forces acting in opposite directions can be found by subtracting the smaller force from the larger force. In this case, Umar's force is 25 N and Amir's force is 20 N. Subtracting 20 N from 25 N gives us a resultant of 5 N.

The correct answer is "nada". "Nada" refers to a sound or tone that has a regular frequency. The other options, "desah", "dentum", and "gaung", do not specifically refer to sounds with regular frequencies.

The correct answer is "tegak, sama besar". When an object is placed in front of a flat mirror, the image formed is virtual, upright, and of the same size as the object. This means that the image appears to be standing straight and has the same dimensions as the object.

Based on the given question, it is asking which image is the most accurate representation when a hanging magnet is approached by another magnet. Without the actual images provided, it is not possible to provide a specific explanation for why option B is the correct answer.

The correct answer is "Panjang, Massa, Waktu". This is because panjang (length), massa (mass), and waktu (time) are fundamental or base quantities in physics. They are independent and cannot be derived from any other physical quantities.

The density of a substance is calculated by dividing its mass by its volume. In this case, the mass of the aluminum is given as 120 grams and the volume is given as 60 cm³. Dividing the mass by the volume gives us a density of 2 grams per cm³. Therefore, the correct answer is 2 gr/cm³.

The process of breaking down food into smaller pieces with the help of teeth is known as mechanical digestion. This process involves the physical action of chewing and grinding food, which helps to increase its surface area for further digestion. Chemical digestion, on the other hand, involves the breakdown of food molecules through the action of enzymes and other chemicals. Intrasel and ekstrasel are not relevant to the process of food digestion.

The correct answer is "ginjal" because the kidneys are the excretory organs responsible for filtering the blood and removing waste products in the form of urine. The kidneys play a vital role in maintaining the body's fluid balance, regulating blood pressure, and eliminating toxins from the body.

The given answer states that whales often come to the surface of the ocean to breathe. This behavior is an adaptation because whales are mammals and need to breathe air, unlike fish that extract oxygen from the water through their gills. By coming to the surface, whales can inhale fresh air into their lungs and exhale the carbon dioxide. This adaptation allows them to survive in their aquatic environment.

Based on the given food web, label number 1 represents the mouse and label number 2 represents the small bird. This is evident from the arrows showing the flow of energy, where the arrow from number 1 (mouse) points towards number 2 (small bird), indicating that the small bird preys on the mouse. Therefore, the correct answer is "tikus dan burung kecil" (mouse and small bird).

The correct answer is "dalam dosis yang tepat". This means that fertilization will increase crop yields if it is used in the right amount. Using too much or too little fertilizer may not have the desired effect on crop production. Therefore, it is important to apply fertilizers in the appropriate dosage to achieve optimal results.

The correct answer is spermatophyte because spermatophytes are plants that have flowers and seeds. This group of plants includes angiosperms (flowering plants) and gymnosperms (non-flowering plants). The other options, pteridophyta, bryophyte, and tallophyta, do not have flowers and seeds. Pteridophyta refers to ferns and their allies, which reproduce using spores. Bryophytes include mosses, liverworts, and hornworts, which also reproduce using spores. Tallophyta is a term used to refer to algae and fungi, which do not have flowers or seeds.

The specific heat capacity of water is 1 Kal/ gr°C, which means that it takes 1 calorie of heat energy to raise the temperature of 1 gram of water by 1°C. In this case, the mass of water is 5 grams and the temperature change is from 10°C to 40°C. Therefore, the total heat energy required can be calculated as follows:

Q = m * c * ΔT
Q = 5g * 1 Kal/gr°C * (40°C - 10°C)
Q = 5g * 1 Kal/gr°C * 30°C
Q = 150 Kalori

Hence, the correct answer is 150 Kalori.

When plastic is rubbed against hair, electrons are transferred from the hair to the plastic. This causes the plastic to become negatively charged, as it gains extra electrons. Therefore, the correct answer is "elektron pindah dari rambut ke plastik" which means "electrons move from hair to plastic" in English.

Gerak lurus berubah beraturan adalah gerakan dengan percepatan konstan. Dalam hal ini, buah kelapa yang jatuh dari pohon mengalami percepatan konstan karena ditarik ke bawah oleh gravitasi. Ketika buah kelapa jatuh, percepatannya tetap konstan karena gaya gravitasi yang bekerja pada buah kelapa tidak berubah sepanjang jatuh. Oleh karena itu, buah kelapa yang jatuh dari pohon termasuk gerak lurus berubah beraturan.

The correct answer is xylem. Xylem is the plant tissue responsible for transporting water and minerals from the roots to the leaves. It consists of specialized cells called tracheids and vessel elements that form a network of tubes. These tubes allow for the upward movement of water through capillary action and transpiration pull. Xylem also provides structural support to the plant.

The correct answer is H - I - H - G - H because it follows the pattern of the given sequence. The sequence starts with H, then goes to I, then back to H, then to G, and finally back to H again. This pattern repeats itself throughout the sequence.

The given question asks for the magnitude of current I1. The correct answer is 4 A. This means that the current flowing through the circuit is 4 Amperes.

During a lunar eclipse, the Earth is positioned between the Sun and the Moon in a straight line. This alignment causes the Earth's shadow to fall on the Moon, resulting in the lunar eclipse.

Ikan remora yang menempel pada ikan hiu merupakan contoh simbiosis komensalisme. Dalam simbiosis komensalisme, satu spesies mendapatkan manfaat tanpa memberikan manfaat atau merugikan spesies lainnya. Dalam hal ini, ikan remora mendapatkan perlindungan dan makanan yang tersedia karena menempel pada ikan hiu, sementara ikan hiu tidak mendapatkan manfaat atau kerugian dari keberadaan ikan remora.

The correct answer is 48 Joule. From the given image, it can be observed that the force applied on the block is 12 Newtons and the distance over which the force is applied is 4 meters. The work done is calculated by multiplying the force applied by the distance traveled, which gives us 48 Joules.

Aluminum is the best conductor among the given options. It has high electrical conductivity, making it efficient in transmitting electrical signals or current. Aluminum is widely used in electrical wiring, power transmission lines, and various electronic devices due to its excellent conductivity and cost-effectiveness.

The correct answer is A.

The pressure exerted on a surface is given by the formula P = F/A, where P is the pressure, F is the force, and A is the area. In this question, the area of A1 is given as 0.001 m and the area of A2 is given as 0.1 m. The force exerted on A2 can be calculated by rearranging the formula as F = P * A. Since the pressure is not given, we cannot calculate the exact force. Therefore, an explanation for the given answer is not available.

In the given image, number 2 represents the male reproductive organ of the flower. This organ, known as the stamen, consists of the filament and the anther. The filament supports the anther, which contains the pollen grains. The stamen is responsible for producing and releasing the male gametes (pollen) for fertilization. Therefore, it functions as the male reproductive organ of the flower.

The correct answer is A. The explanation for this is that the direction of the magnetic field lines between two magnetic poles is from the north pole to the south pole. This is based on the convention that the magnetic field lines are considered to originate from the north pole and terminate at the south pole. Therefore, option A is the correct answer as it represents the direction of the magnetic field lines between two magnetic poles.

The correct answer is c - g. In the given image, there are two points labeled as c and g. The question asks for the unit of wavelength, and the unit is usually measured as the distance between two consecutive points on a wave. Therefore, the correct answer is c - g, as it represents the distance between these two points on the wave.

The correct answer is 300 Volt. This can be calculated using Ohm's Law, which states that the voltage across a resistor is equal to the current flowing through it multiplied by the resistance. In this case, the current is 2 A and the resistance is 150 Ohm. Therefore, the voltage across the resistor is 2 A * 150 Ohm = 300 Volt.

Kifosis adalah kelainan pada tulang belakang yang menyebabkan punggung melengkung ke depan. Kondisi ini dapat terjadi akibat kebiasaan menulis pada meja yang terlalu pendek, di mana posisi tubuh yang tidak tepat dapat mempengaruhi postur tulang belakang.

The correct order of the passage of impulses in normal movement is from the receptor (6) to the effector (1), then to the central nervous system (3), followed by the motor nerves (4), and finally to the sensory nerves (2).

The correct answer is 1 and 3 because the number of wire turns in a coil and the speed of motion of the magnet or coil are factors that affect the magnitude of electromagnetic induction.

Pernyataan 1 dan 3 sesuai dengan proses seleksi alam. Pernyataan 1 menjelaskan bahwa belalang yang berwarna hijau dapat bertahan hidup karena dapat menyamar dengan lingkungan rumput yang juga berwarna hijau, sedangkan belalang yang berwarna kuning akan mudah terlihat oleh pemangsanya dan punah. Pernyataan 3 menjelaskan bahwa kupu-kupu Biston betularia yang hidup di Inggris setelah revolusi industri lebih banyak berwarna hitam karena polusi asap menyamarkan pandangan pemangsanya, sehingga kupu-kupu berwarna hitam memiliki keuntungan dalam bertahan hidup.

The correct answer is "tegangan primer lebih kecil daripada tegangan sekunder". This is because a step-up transformer is designed to increase the voltage from the primary side to the secondary side. In a step-up transformer, the number of turns in the secondary coil is greater than the number of turns in the primary coil, resulting in a higher voltage in the secondary coil compared to the primary coil. Therefore, the voltage in the primary coil is smaller than the voltage in the secondary coil.

A group of interconnected structures that perform a specific function in an organism is called an organ. In this context, the question is asking about a collection of networks that have the same function, which would form an organ. The other options, such as "sel" (cell), "sistem organ" (organ system), and "organisme" (organism), do not accurately describe a group of interconnected structures with the same function.

The correct answer is "penyesuaian fungsi alat tubuh makhluk hidup terhadap lingkungannya". This option states that physiological adaptation refers to the adjustment of the body's organs and functions in response to the environment. It implies that living organisms modify their bodily functions to better suit their surroundings.

The correct answer is 1, 3, and 5. These options are the only ones that include efforts related to agricultural intensification. Pemberantasan hama dan penyakit (eradication of pests and diseases) is a form of intensification as it aims to increase crop productivity by reducing the negative impact of pests and diseases. Pemupukan (fertilization) is also a form of intensification as it involves adding nutrients to the soil to enhance plant growth and productivity. Teknik tumpang sari (intercropping) is another form of intensification as it involves growing multiple crops in the same area to maximize land use and increase overall yield.

In the given image, the bronchus is labeled with the number 3. The bronchus is a passage that connects the trachea to the lungs and allows the passage of air.

Dalam soal ini, diketahui bahwa dalam waktu 5 menit (atau 300 detik), muatan listrik yang mengalir melalui kawat penghantar adalah 60 Coulomb. Kuat arus listrik dapat dihitung dengan rumus Q/t, dimana Q adalah muatan listrik dan t adalah waktu. Dengan menggantikan nilai yang diketahui, maka kuat arus listriknya adalah 60 Coulomb / 300 detik = 0,2 Ampere.