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Explain the process of photosynthesis. | Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll. It involves the intake of carbon dioxide and water, which, in the presence of sunlight, are converted into glucose and oxygen. |
What are the main causes of climate change? | The primary causes of climate change include the burning of fossil fuels, deforestation, and industrial activities, all of which increase the concentration of greenhouse gases in the atmosphere, leading to global warming. |
Describe the significance of the Battle of Hastings. | The Battle of Hastings, fought in 1066, was a pivotal event in English history. It led to the Norman conquest of England, significantly influencing the country's culture, language, and governance. |
How does the human circulatory system function? | The human circulatory system consists of the heart, blood, and blood vessels. The heart pumps oxygenated blood through arteries to various body tissues and returns deoxygenated blood through veins to the lungs for oxygenation. |
What is the theory of evolution by natural selection? | Proposed by Charles Darwin, the theory of evolution by natural selection posits that organisms better adapted to their environment tend to survive and produce more offspring, leading to the gradual evolution of species over time. |