role in sustaining life on earth. (Figure 1) For many years thousands of groups of indigenous people behaved in many ways that often transformed ecosystems and led to the extinction of many species. Recently‚ contemporary industrial societies have exploited the biophysical environment with little regard for its ecological limits. Atmosphere is only the thing that keeps you from being burned to death
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Chapter 3 Ecosystems: What Are They and How Do They Work? Section 3-1: What Keeps Us and Other Organisms Alive? Earth’s life support system has four major components: The atmosphere (air) The hydrosphere (water) The geosphere (rock‚ soil‚ and sediment) The biosphere (living things) The Atmosphere The atmosphere can be divided into two layers: The troposphere extends about 17 km above sea level at the tropics and about 7 km above the north and south poles. It contains the air we breathe: 78% Nitrogen
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species use of the abiotic and biotic resources in its environment 6. Symbiosis: an ecological relationship between organisms of two different species that live together in direct contact 7. Commensalism: A symbiotic relationship in which the symboint benefits but the host is neither helped nor harmed. 8. Mutualism: a symbiotic relationship in which
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Vocabulary Terms to Know Chapter 3 • Ecosystem- A particular location on Earth distinguished by its mix of interacting biotic and abiotic components. • Producers/ Autotrophs-organisms that use the energy of the Sun to produce usable forms of energy • photosynthesis- the process by which producers use solar energy to convert CO2 and water into glucose. • cellular respiration- the process by which cells convert glucose and oxygen into energy‚ carbon dioxide‚ and water. •
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the number of individuals doubles in a specific time interval and keeps doubling in increasingly shorter periods of time. The J-shaped curve is also called as Exponential curve. Biotic potential – the maximum rate at which a population could increase under ideal conditions – an environment with unlimited resources. The biotic potential is rarely achieved by population in natural
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Study Sheet for Biology SB4: Chapter 3 Concept Checks Concept Check 3.1: ~Animal Behavior: what an animal does as it interacts with its environment. ~ Immediate Cause: explanation of an organism’s behavior based on its immediate interactions with the environment ~Ultimate Cause: explanation of an organism’s behavior based on its evolutionary adaptations 1. Why do the whales blow bubbles when they touch the surface? What allows the whales to blow bubbles when they reach the surface? 2. Tinbergen’s
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will be able to know about- •Environment •Biosphere •Ecosystem model •Atmosphere •Atmospheric pollution •Primary & secondary pollutants •Acid rain •Ozone depletion •Green house effect •Noise pollution That which surrounds‚ the total sum of the condition of the surroundings within which an organism‚ or group‚ or an object‚exists(including the natural as modified by human activity & the artificial). Atmosphere Sea Biotic Environment Abiotic Environment Atmosphere Biosphere The entire part
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Some biotic factors are producers such as bermudagrass‚ jarrah tree‚ and river bushwillow which make energy from the sun which is sugar by the process of photosynthesis which primary consumers feed on. Primary consumers are animals such as zebras‚ elephants‚
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(influences and is utilized by) a species population. Within each ecosystem‚ there are habitats which may also vary in size. A habitat is the place where a population lives. A population is a group of living organisms of the same kind living in the same place at the same time. All of the populations interact and form a community. The community of living things interacts with the non-living world around it to form the ecosystem. The habitat must supply the needs of organisms‚ such as food‚ water
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important in ecosystems across the world. They help control things like population‚ abiotic and biotic life‚ and impacts on human life. Keystone species essentially control the functions of the environment they live in‚ and provide positive and negative effects. In class‚ we studied the effect that wolves had on the environment of Yellowstone National Park. Now‚ I introduce Grizzly Bears and Beavers as my two examples of a Keystone Species. Beavers completely change their respective ecosystems because
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