Organisms and Populations

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Habitat is the physical place where an organism lives (like a postal address), while niche is the functional role an organism plays in its environment (like its profession). Habitat supports multiple …

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Ecology is the study of interactions among organisms and between organisms and their physical environment. The ecological hierarchy includes: 1) Individual organism (basic unit), 2) Population (same s…

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1) Temperature - affects enzyme kinetics and metabolism, varies from polar regions to deserts; 2) Water - essential for life processes, determines organism distribution; 3) Light - required for photos…

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Eurythermal organisms can tolerate a wide range of temperatures (e.g., humans, cockroaches), while stenothermal organisms are restricted to narrow temperature ranges (e.g., polar bears in cold regions…

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1) Regulate - maintain constant internal environment through physiological/behavioral changes (homeostasis in birds, mammals); 2) Conform - body changes with environment (most animals and plants); 3) …

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1) Thick cuticle and sunken stomata to minimize water loss (most cacti); 2) CAM photosynthesis allowing stomata to remain closed during day (desert succulents); 3) Modified leaves as spines with stems…

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Allen's Rule states that mammals from colder climates have shorter snout, ears, tail, and limbs to minimize heat loss. Example: Arctic fox has shorter ears and limbs compared to desert fox. This is be…

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Population is a group of organisms of the same species living in a well-defined geographical area, sharing resources and potentially interbreeding. Key characteristics: 1) Size (number of individuals)…