Option A: Due to the increase in the height of the atmosphere, the size of the balloon will decrease. As the balloon rises, the atmospheric pressure decreases. Since the pressure inside the balloon remains constant due to the ideal gas law, the gas molecules inside expand to occupy more space. HowevRead more
Option A: Due to the increase in the height of the atmosphere, the size of the balloon will decrease. As the balloon rises, the atmospheric pressure decreases. Since the pressure inside the balloon remains constant due to the ideal gas law, the gas molecules inside expand to occupy more space. However, the balloon’s material constrains this expansion, causing it to stretch and decrease in size. Therefore, the balloon appears to shrink as it ascends. Option B (The balloon will flatten and come in the shape of a disc) is incorrect because the balloon’s shape is determined by its elasticity and the pressure difference between the inside and outside. As the pressure inside remains constant, the balloon’s shape won’t flatten into a disc. Option C (The size of the balloon will increase) is also incorrect because, although the gas inside expands, the material constrains this expansion, causing the balloon’s size to decrease. Option D (The size and shape of the balloon will remain the same as before) is inaccurate because the balloon’s size decreases due to the pressure difference between the inside and outside as it ascends through the atmosphere. Therefore, option A, the size of the balloon will decrease, is the correct choice.
Option A: It is more difficult to breathe on mountains than on plains because as altitude increases, air pressure decreases, and the need for oxygen increases. At higher altitudes, the air pressure is lower, meaning there are fewer air molecules per volume. This reduced air pressure makes it harderRead more
Option A: It is more difficult to breathe on mountains than on plains because as altitude increases, air pressure decreases, and the need for oxygen increases. At higher altitudes, the air pressure is lower, meaning there are fewer air molecules per volume. This reduced air pressure makes it harder for our lungs to take in oxygen from the air. Additionally, with lower air pressure, the partial pressure of oxygen decreases, making it more challenging for oxygen to diffuse into the bloodstream. As a result, our bodies need to work harder to obtain the same amount of oxygen, leading to symptoms like shortness of breath, dizziness, and fatigue at high altitudes. Option B (Mountain air is heavy and cannot be filled in the lungs) is incorrect; mountain air is not heavier, but rather thinner due to lower pressure. Option C (Mountain air is impure, hence we cannot take it) is also incorrect; while air quality may vary, difficulty in breathing at high altitudes is primarily due to lower air pressure, not impurities in the air. Therefore, option A accurately explains why it is more difficult to breathe on mountains compared to plains.
Option C: When a Fortin barometer is taken to a high mountain, the mercury falls in the tube because atmospheric pressure becomes lower there. Atmospheric pressure decreases with altitude due to the reduced column of air above. This lower pressure causes the mercury column in the barometer tube to dRead more
Option C: When a Fortin barometer is taken to a high mountain, the mercury falls in the tube because atmospheric pressure becomes lower there. Atmospheric pressure decreases with altitude due to the reduced column of air above. This lower pressure causes the mercury column in the barometer tube to drop, indicating the change in pressure. Unlike options A, B, and D, which don’t directly relate to the mechanism of barometric pressure changes, option C aligns with the fundamental principle of barometric measurement. As the altitude increases, the weight of the air column above decreases, resulting in lower atmospheric pressure. This pressure difference causes the mercury in the barometer tube to fall until it reaches equilibrium with the surrounding atmospheric pressure. Therefore, the decrease in atmospheric pressure at higher altitudes is the primary reason for the mercury falling in the Fortin barometer tube. Understanding this principle is crucial for interpreting barometric readings accurately, especially when measuring atmospheric pressure variations in different geographical locations and altitudes.
Option C: Before flight, the airplane is run on the runway to reduce the friction force between the ground and the aircraft. This process is crucial for enabling the aircraft to accelerate smoothly and achieve takeoff speed. When the airplane moves, the friction between its wheels and the runway genRead more
Option C: Before flight, the airplane is run on the runway to reduce the friction force between the ground and the aircraft. This process is crucial for enabling the aircraft to accelerate smoothly and achieve takeoff speed. When the airplane moves, the friction between its wheels and the runway generates a force called rolling friction. By running the airplane on the runway, the initial friction helps to overcome inertia and resistance, gradually reducing as the aircraft gains speed. Reducing this friction ensures that the aircraft can accelerate effectively without excessive resistance, allowing it to reach the required takeoff velocity. Once the aircraft reaches sufficient speed, the lift generated by its wings surpasses the gravitational force, enabling it to become airborne. Options A (to reduce the working air pressure) and B (to increase the working air pressure) are incorrect, as the running of the airplane on the runway primarily affects friction force and has minimal impact on air pressure. Option D (to increase the friction force between the ground by the aircraft) is also incorrect, as increasing friction would hinder the airplane’s movement rather than facilitating takeoff. Therefore, option C accurately describes the purpose of running the airplane on the runway before flight.
Option D: A rubber balloon filled with hydrogen bursts when it goes up in the air because air pressure decreases. As the balloon ascends, it enters regions of lower atmospheric pressure. Inside the balloon, the pressure of the hydrogen gas remains relatively constant. However, the decreasing externaRead more
Option D: A rubber balloon filled with hydrogen bursts when it goes up in the air because air pressure decreases. As the balloon ascends, it enters regions of lower atmospheric pressure. Inside the balloon, the pressure of the hydrogen gas remains relatively constant. However, the decreasing external air pressure exerts less force on the balloon’s surface. This pressure difference causes the hydrogen gas inside the balloon to expand to occupy a larger volume. Since the balloon’s elasticity has limits, it eventually reaches a point where it can no longer contain the expanding gas, leading to the balloon bursting.
Option A (the weight of hydrogen increases) is incorrect because the weight of the hydrogen remains constant. Option B (air pressure increases) is incorrect as the scenario involves a decrease in air pressure with altitude. Option C (the pressure of hydrogen decreases) is incorrect because the pressure of the hydrogen gas inside the balloon remains relatively constant; it’s the external air pressure that decreases. Therefore, the most accurate explanation is option D, as the bursting of the balloon is a result of the decreasing air pressure at higher altitudes.
Ecology is related to [C] Body structure and environment. Ecology is the scientific discipline that focuses on the study of the interactions between organisms and their environment. It examines how living organisms, including humans, interact with each other and with their surrounding physical and bRead more
Ecology is related to [C] Body structure and environment. Ecology is the scientific discipline that focuses on the study of the interactions between organisms and their environment. It examines how living organisms, including humans, interact with each other and with their surrounding physical and biological environments. Ecology encompasses various levels of biological organization, ranging from individual organisms to entire ecosystems. It explores topics such as population dynamics, community structure, biodiversity, energy flow, and nutrient cycling within ecosystems.
By studying ecology, researchers gain insights into the intricate relationships between organisms and their environment, including how environmental factors influence the distribution, abundance, and behavior of species, and how ecosystems respond to natural and human-induced disturbances. Ecology plays a critical role in addressing environmental challenges such as habitat destruction, climate change, pollution, and conservation efforts, providing valuable knowledge for sustainable management of natural resources and protection of biodiversity.
Genetics is related to [A] Heredity. Genetics is the scientific study of how traits are passed from parents to offspring through genes. It encompasses the inheritance of characteristics such as eye color, height, and susceptibility to diseases. By examining the structure, function, and transmissionRead more
Genetics is related to [A] Heredity. Genetics is the scientific study of how traits are passed from parents to offspring through genes. It encompasses the inheritance of characteristics such as eye color, height, and susceptibility to diseases. By examining the structure, function, and transmission of genes, geneticists gain insights into the mechanisms underlying heredity and variation in populations. Understanding genetics is crucial for unraveling the genetic basis of inherited disorders, identifying genetic risk factors for diseases, and exploring the evolutionary origins of species.
Additionally, genetics plays a central role in fields such as medicine, agriculture, and forensic science, where it is applied to diagnose genetic disorders, develop personalized treatments, improve crop yields, and establish paternity or ancestry. Overall, genetics provides a foundation for understanding the principles of heredity and evolution, shaping our knowledge of biological diversity and the interconnectedness of living organisms across generations.
In genetics, [A] Heredity and chromosomes are studied. Genetics is the scientific discipline that explores the principles of inheritance and variation in living organisms. It delves into the mechanisms by which traits are passed from one generation to the next through genes located on chromosomes. TRead more
In genetics, [A] Heredity and chromosomes are studied. Genetics is the scientific discipline that explores the principles of inheritance and variation in living organisms. It delves into the mechanisms by which traits are passed from one generation to the next through genes located on chromosomes. This field encompasses the study of DNA, genes, alleles, and genetic interactions that determine the phenotypic characteristics of organisms. Geneticists investigate how genetic information is transmitted, expressed, and regulated, as well as how mutations and genetic variations contribute to biological diversity and disease susceptibility.
Additionally, genetics plays a vital role in various fields such as medicine, agriculture, and evolutionary biology, where it is applied to understand and manipulate genetic traits for purposes ranging from disease diagnosis and treatment to crop improvement and conservation. Overall, genetics provides essential insights into the fundamental processes governing life and heredity on both molecular and organismal levels.
Oncology is the study of [B] Cancer. It is a specialized field of medicine focused on the diagnosis, treatment, and prevention of cancer. Oncologists are medical professionals who specialize in managing patients with cancer, employing various treatment modalities such as surgery, chemotherapy, radiaRead more
Oncology is the study of [B] Cancer. It is a specialized field of medicine focused on the diagnosis, treatment, and prevention of cancer. Oncologists are medical professionals who specialize in managing patients with cancer, employing various treatment modalities such as surgery, chemotherapy, radiation therapy, immunotherapy, and targeted therapy. They also play a crucial role in cancer prevention, screening, and surveillance programs. Oncology encompasses the study of all aspects of cancer biology, including the cellular and molecular mechanisms underlying cancer development, progression, and metastasis.
By understanding the biology of cancer, oncologists aim to develop more effective treatment strategies and improve patient outcomes. Oncology research also explores new approaches for early detection, precision medicine, personalized treatment regimens, and supportive care for cancer patients. Overall, oncology plays a vital role in addressing the global burden of cancer and advancing knowledge to combat this complex and multifaceted disease.
The study of tissue culture is primarily useful for [B] For plants. Tissue culture techniques involve the growth of plant cells, tissues, or organs in an artificial medium under controlled conditions. This process has various applications in plant science, agriculture, and horticulture. Tissue cultuRead more
The study of tissue culture is primarily useful for [B] For plants. Tissue culture techniques involve the growth of plant cells, tissues, or organs in an artificial medium under controlled conditions. This process has various applications in plant science, agriculture, and horticulture. Tissue culture allows for the rapid propagation of plants from small tissue samples, enabling the production of large numbers of uniform, disease-free plants in a short period. It also facilitates the conservation of rare or endangered plant species through the establishment of plant tissue banks.
Furthermore, tissue culture is instrumental in plant breeding programs for the development of new cultivars with desired traits, such as disease resistance or improved yield. Additionally, tissue culture techniques are used for genetic engineering to introduce specific genes into plant cells, leading to the production of genetically modified plants with enhanced characteristics, such as pest resistance or increased nutritional value.
A polythene balloon filled with hydrogen is released from the earth’s surface. Due to increase in the height of the atmosphere
Option A: Due to the increase in the height of the atmosphere, the size of the balloon will decrease. As the balloon rises, the atmospheric pressure decreases. Since the pressure inside the balloon remains constant due to the ideal gas law, the gas molecules inside expand to occupy more space. HowevRead more
Option A: Due to the increase in the height of the atmosphere, the size of the balloon will decrease. As the balloon rises, the atmospheric pressure decreases. Since the pressure inside the balloon remains constant due to the ideal gas law, the gas molecules inside expand to occupy more space. However, the balloon’s material constrains this expansion, causing it to stretch and decrease in size. Therefore, the balloon appears to shrink as it ascends. Option B (The balloon will flatten and come in the shape of a disc) is incorrect because the balloon’s shape is determined by its elasticity and the pressure difference between the inside and outside. As the pressure inside remains constant, the balloon’s shape won’t flatten into a disc. Option C (The size of the balloon will increase) is also incorrect because, although the gas inside expands, the material constrains this expansion, causing the balloon’s size to decrease. Option D (The size and shape of the balloon will remain the same as before) is inaccurate because the balloon’s size decreases due to the pressure difference between the inside and outside as it ascends through the atmosphere. Therefore, option A, the size of the balloon will decrease, is the correct choice.
See lessWhy is it more difficult to breathe on mountains than on plains?
Option A: It is more difficult to breathe on mountains than on plains because as altitude increases, air pressure decreases, and the need for oxygen increases. At higher altitudes, the air pressure is lower, meaning there are fewer air molecules per volume. This reduced air pressure makes it harderRead more
Option A: It is more difficult to breathe on mountains than on plains because as altitude increases, air pressure decreases, and the need for oxygen increases. At higher altitudes, the air pressure is lower, meaning there are fewer air molecules per volume. This reduced air pressure makes it harder for our lungs to take in oxygen from the air. Additionally, with lower air pressure, the partial pressure of oxygen decreases, making it more challenging for oxygen to diffuse into the bloodstream. As a result, our bodies need to work harder to obtain the same amount of oxygen, leading to symptoms like shortness of breath, dizziness, and fatigue at high altitudes. Option B (Mountain air is heavy and cannot be filled in the lungs) is incorrect; mountain air is not heavier, but rather thinner due to lower pressure. Option C (Mountain air is impure, hence we cannot take it) is also incorrect; while air quality may vary, difficulty in breathing at high altitudes is primarily due to lower air pressure, not impurities in the air. Therefore, option A accurately explains why it is more difficult to breathe on mountains compared to plains.
See lessWhen Fortin barometer is taken to a high mountain. So, the mercury falls in the tube, because
Option C: When a Fortin barometer is taken to a high mountain, the mercury falls in the tube because atmospheric pressure becomes lower there. Atmospheric pressure decreases with altitude due to the reduced column of air above. This lower pressure causes the mercury column in the barometer tube to dRead more
Option C: When a Fortin barometer is taken to a high mountain, the mercury falls in the tube because atmospheric pressure becomes lower there. Atmospheric pressure decreases with altitude due to the reduced column of air above. This lower pressure causes the mercury column in the barometer tube to drop, indicating the change in pressure. Unlike options A, B, and D, which don’t directly relate to the mechanism of barometric pressure changes, option C aligns with the fundamental principle of barometric measurement. As the altitude increases, the weight of the air column above decreases, resulting in lower atmospheric pressure. This pressure difference causes the mercury in the barometer tube to fall until it reaches equilibrium with the surrounding atmospheric pressure. Therefore, the decrease in atmospheric pressure at higher altitudes is the primary reason for the mercury falling in the Fortin barometer tube. Understanding this principle is crucial for interpreting barometric readings accurately, especially when measuring atmospheric pressure variations in different geographical locations and altitudes.
See lessBefore flight, the airplane is run on the runway
Option C: Before flight, the airplane is run on the runway to reduce the friction force between the ground and the aircraft. This process is crucial for enabling the aircraft to accelerate smoothly and achieve takeoff speed. When the airplane moves, the friction between its wheels and the runway genRead more
Option C: Before flight, the airplane is run on the runway to reduce the friction force between the ground and the aircraft. This process is crucial for enabling the aircraft to accelerate smoothly and achieve takeoff speed. When the airplane moves, the friction between its wheels and the runway generates a force called rolling friction. By running the airplane on the runway, the initial friction helps to overcome inertia and resistance, gradually reducing as the aircraft gains speed. Reducing this friction ensures that the aircraft can accelerate effectively without excessive resistance, allowing it to reach the required takeoff velocity. Once the aircraft reaches sufficient speed, the lift generated by its wings surpasses the gravitational force, enabling it to become airborne. Options A (to reduce the working air pressure) and B (to increase the working air pressure) are incorrect, as the running of the airplane on the runway primarily affects friction force and has minimal impact on air pressure. Option D (to increase the friction force between the ground by the aircraft) is also incorrect, as increasing friction would hinder the airplane’s movement rather than facilitating takeoff. Therefore, option C accurately describes the purpose of running the airplane on the runway before flight.
See lessA rubber balloon filled with hydrogen bursts when it goes up in the air,
Option D: A rubber balloon filled with hydrogen bursts when it goes up in the air because air pressure decreases. As the balloon ascends, it enters regions of lower atmospheric pressure. Inside the balloon, the pressure of the hydrogen gas remains relatively constant. However, the decreasing externaRead more
Option D: A rubber balloon filled with hydrogen bursts when it goes up in the air because air pressure decreases. As the balloon ascends, it enters regions of lower atmospheric pressure. Inside the balloon, the pressure of the hydrogen gas remains relatively constant. However, the decreasing external air pressure exerts less force on the balloon’s surface. This pressure difference causes the hydrogen gas inside the balloon to expand to occupy a larger volume. Since the balloon’s elasticity has limits, it eventually reaches a point where it can no longer contain the expanding gas, leading to the balloon bursting.
Option A (the weight of hydrogen increases) is incorrect because the weight of the hydrogen remains constant. Option B (air pressure increases) is incorrect as the scenario involves a decrease in air pressure with altitude. Option C (the pressure of hydrogen decreases) is incorrect because the pressure of the hydrogen gas inside the balloon remains relatively constant; it’s the external air pressure that decreases. Therefore, the most accurate explanation is option D, as the bursting of the balloon is a result of the decreasing air pressure at higher altitudes.
See lessWhat is Ecology related to?
Ecology is related to [C] Body structure and environment. Ecology is the scientific discipline that focuses on the study of the interactions between organisms and their environment. It examines how living organisms, including humans, interact with each other and with their surrounding physical and bRead more
Ecology is related to [C] Body structure and environment. Ecology is the scientific discipline that focuses on the study of the interactions between organisms and their environment. It examines how living organisms, including humans, interact with each other and with their surrounding physical and biological environments. Ecology encompasses various levels of biological organization, ranging from individual organisms to entire ecosystems. It explores topics such as population dynamics, community structure, biodiversity, energy flow, and nutrient cycling within ecosystems.
See lessBy studying ecology, researchers gain insights into the intricate relationships between organisms and their environment, including how environmental factors influence the distribution, abundance, and behavior of species, and how ecosystems respond to natural and human-induced disturbances. Ecology plays a critical role in addressing environmental challenges such as habitat destruction, climate change, pollution, and conservation efforts, providing valuable knowledge for sustainable management of natural resources and protection of biodiversity.
What is genetics related to?
Genetics is related to [A] Heredity. Genetics is the scientific study of how traits are passed from parents to offspring through genes. It encompasses the inheritance of characteristics such as eye color, height, and susceptibility to diseases. By examining the structure, function, and transmissionRead more
Genetics is related to [A] Heredity. Genetics is the scientific study of how traits are passed from parents to offspring through genes. It encompasses the inheritance of characteristics such as eye color, height, and susceptibility to diseases. By examining the structure, function, and transmission of genes, geneticists gain insights into the mechanisms underlying heredity and variation in populations. Understanding genetics is crucial for unraveling the genetic basis of inherited disorders, identifying genetic risk factors for diseases, and exploring the evolutionary origins of species.
See lessAdditionally, genetics plays a central role in fields such as medicine, agriculture, and forensic science, where it is applied to diagnose genetic disorders, develop personalized treatments, improve crop yields, and establish paternity or ancestry. Overall, genetics provides a foundation for understanding the principles of heredity and evolution, shaping our knowledge of biological diversity and the interconnectedness of living organisms across generations.
What is studied in genetics?
In genetics, [A] Heredity and chromosomes are studied. Genetics is the scientific discipline that explores the principles of inheritance and variation in living organisms. It delves into the mechanisms by which traits are passed from one generation to the next through genes located on chromosomes. TRead more
In genetics, [A] Heredity and chromosomes are studied. Genetics is the scientific discipline that explores the principles of inheritance and variation in living organisms. It delves into the mechanisms by which traits are passed from one generation to the next through genes located on chromosomes. This field encompasses the study of DNA, genes, alleles, and genetic interactions that determine the phenotypic characteristics of organisms. Geneticists investigate how genetic information is transmitted, expressed, and regulated, as well as how mutations and genetic variations contribute to biological diversity and disease susceptibility.
Additionally, genetics plays a vital role in various fields such as medicine, agriculture, and evolutionary biology, where it is applied to understand and manipulate genetic traits for purposes ranging from disease diagnosis and treatment to crop improvement and conservation. Overall, genetics provides essential insights into the fundamental processes governing life and heredity on both molecular and organismal levels.
See lessOncology is the study of what?
Oncology is the study of [B] Cancer. It is a specialized field of medicine focused on the diagnosis, treatment, and prevention of cancer. Oncologists are medical professionals who specialize in managing patients with cancer, employing various treatment modalities such as surgery, chemotherapy, radiaRead more
Oncology is the study of [B] Cancer. It is a specialized field of medicine focused on the diagnosis, treatment, and prevention of cancer. Oncologists are medical professionals who specialize in managing patients with cancer, employing various treatment modalities such as surgery, chemotherapy, radiation therapy, immunotherapy, and targeted therapy. They also play a crucial role in cancer prevention, screening, and surveillance programs. Oncology encompasses the study of all aspects of cancer biology, including the cellular and molecular mechanisms underlying cancer development, progression, and metastasis.
See lessBy understanding the biology of cancer, oncologists aim to develop more effective treatment strategies and improve patient outcomes. Oncology research also explores new approaches for early detection, precision medicine, personalized treatment regimens, and supportive care for cancer patients. Overall, oncology plays a vital role in addressing the global burden of cancer and advancing knowledge to combat this complex and multifaceted disease.
What is the study of tissue culture useful for?
The study of tissue culture is primarily useful for [B] For plants. Tissue culture techniques involve the growth of plant cells, tissues, or organs in an artificial medium under controlled conditions. This process has various applications in plant science, agriculture, and horticulture. Tissue cultuRead more
The study of tissue culture is primarily useful for [B] For plants. Tissue culture techniques involve the growth of plant cells, tissues, or organs in an artificial medium under controlled conditions. This process has various applications in plant science, agriculture, and horticulture. Tissue culture allows for the rapid propagation of plants from small tissue samples, enabling the production of large numbers of uniform, disease-free plants in a short period. It also facilitates the conservation of rare or endangered plant species through the establishment of plant tissue banks.
Furthermore, tissue culture is instrumental in plant breeding programs for the development of new cultivars with desired traits, such as disease resistance or improved yield. Additionally, tissue culture techniques are used for genetic engineering to introduce specific genes into plant cells, leading to the production of genetically modified plants with enhanced characteristics, such as pest resistance or increased nutritional value.
See less