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Biomass pyramids show the amount of organic material at each trophic level; thus, they are the best type of ecological pyramid to use in order to model the flow of matter through an ecosystem. A numbers pyramid would not as accurately display this kind of information because a larger producer, such as a tree, which contains a great deal of matter, would be able to feed hundreds or thousands of small first-level consumers such as wood-eating insects.
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A number of human activities can impact on the water cycle: damming rivers for hydroelectricity, using water for farming, deforestation and the burning of fossil fuels
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so its true that owls have black eyes
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Owls have unique feather colors. One species of owl displays dark brown feathers whereas another owl of the same species has light brown feathers. When a dark feathered owl mates with a light feathered owl all their offspring are mottled with dark and light brown feathers.
The third stage of mitosis is metaphase. in this stage the chromatin already condensed to form a chromosome. so the chromosomes arranged in inorderly manner unless spindle fiber appear to form vertically.
