3.3 Understanding Bacteria

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What is bacteria?

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Bacteria are single-celled microorganisms that can be found in various environments. They can be beneficial, harmful, or neutral to humans and other organisms.

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What is MRSA?

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MRSA stands for Methicillin-Resistant Staphylococcus Aureus, a type of bacteria that is resistant to many antibiotics and can cause serious infections.

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What is natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What is adaptation in biology?

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Adaptation is a trait that helps an organism survive and reproduce in its environment.

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What evidence supports the theory of evolution?

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Fossil records, genetic similarities, and observed changes in species over time support the theory of evolution.

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How do bacteria reproduce?

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Bacteria reproduce asexually through a process called binary fission, where one cell divides into two identical cells.

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What role do bacteria play in ecosystems?

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Bacteria play essential roles in ecosystems, including decomposing organic matter, cycling nutrients, and forming symbiotic relationships with other organisms.

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What is the significance of antibiotic resistance?

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Antibiotic resistance occurs when bacteria evolve to survive exposure to antibiotics, making infections harder to treat and posing a public health risk.

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What is a pathogen?

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A pathogen is any organism that can cause disease, including bacteria, viruses, fungi, and parasites.

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What is the difference between beneficial and harmful bacteria?

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Beneficial bacteria help with processes like digestion and nutrient cycling, while harmful bacteria can cause infections and diseases.

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