amounts of fossil fuels‚ which deplete the soil of its nutrients. The ratio for fossil fuel energy needed for beef production is 35 to 1 as well as 3 to 1 for all other agricultural products. Modern agricultural methods cause aquifers to dry out‚ pollinators such as bees are dying and the climate is getting hotter and drier (Schiffman‚ In Defense of Organic Farming). According to the EPA‚ the water runoff from
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Introduction to sexual reproduction in humans Reproduction is the process by which humans gives rise to new individuals. Sexual reproduction is the process that involves the fusion of two gametes‚ sperm (male gamete) and egg (female gamete). In human these gametes are produced in different sexes‚ the male and female. Reproduction in humans is performed by reproductive systems‚ the male and female reproductive systems. The main organs of male reproductive system are testis and gonads and of female
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Name: Joshua Beh Date: 5/30/12 Per. 3 Biology Semester 2 Final Study Guide 2012 Ch. 13. 1. Define population - Consists of all the individuals of a species that live in a specific geographical area and can interbreed. 2. Define natural selection. - The differential rate of reproduction. 3. Explain how gradualism and punctuated equilibrium relate to evolution. - Both involve the species evolving either over a long period of time or rapidly. 4. What does a paleontologist do? - Scientists
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flexible‚ flat material made by interlacing yarns (or threads) c. Fabrics: cloths produced by weaving or knitting textiles 13. How is pollen “carried”? a. Wind‚ animals‚ or water 14. How do plants that require animals to pollinate them attract pollinators? a. Color‚ smell 15.
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ORGANIC FARMING (Farming without the addition of artificial chemicals.) Organic farming can be defined by the proactive‚ ecological management strategies that maintain and enhance soil fertility‚ prevent soil erosion‚ promote and enhance biological diversity‚ and minimize risk to human and animal health and natural resources. It can also be defined as Vegetable and livestock production using natural sources of nutrients (such as compost‚ crop residues‚ and manure) and natural methods of crop and
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Biology – Preliminary – Evolution of Australian Biota 1. Evidence for the rearrangement of crustal plates and continental drift indicates that Australia was once part of an ancient super continent identify and describe evidence that supports the assertion that Australia was once part of a landmass called Gondwana‚ including: ▪ − matching continental margins ▪ − position of mid-ocean ridges ▪ − spreading zones between continental plates ▪ − fossils in common on Gondwanan continents
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Salt Water or Fresh Water‚ Which Would You Prefer? Many people wonder‚ what big differences are between salt water and fresh water? Is it just water with salt versus water without salt? Those are some common questions people have. Most people ask about the differences‚ but they forget about the similarities of salt water and fresh water‚ as well. Did you know that Salt water and fresh water have very different plant and animal life? There are also a few complex fish that can live in both
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DEFORESTATION AND SPECIES LOSS 1.0 WHAT IS DEFORESTATION? Deforestation is the process whereby natural forests are cleared through logging and/or burning‚ either to use the timber or to replace the area for alternative uses. 2.0 WHAT IS THE EXTENT OF DEFORESTATION? 12-15 million hectares of forest are lost each year‚ the equivalent of 36 football fields per minute. 3.0 WHAT ARE THE MAJOR CAUSES OF DEFORESTATION? Deforestation can happen quickly‚ such as when a fire sweeps through the
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GYMNOSPERMS - phlya Ginkgophyta‚ Gnetophyta‚ Cycadophyta and Coniferophyta - vascular plants with true roots - gymnosperms = “naked seeds” - cones/strobili - have seeds that develop on the surfaces of sporophylls instead of in ovaries like angiosperms - microsporangium produces pollen grains (sperm) and the megasporangium produces the egg - sporophyte generation is dominant - no water needed for fertilization – pollen travels with the wind Pine trees
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The temperature of the Riparian zone affects the physical and the chemical properties of the water and largely influences the organisms affecting their feeding‚ metabolic rates and reproduction. It also affects how much oxygen can be dissolved in the water and how quickly the nutrients will be cycled through the water. Oxygen is better dissolved in cold water because gases are trapped by water molecules at colder temperatures. When temperatures rise‚ the molecules move around more‚ and gases‚ such
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