Plants Organs As was noted in the previous chapter‚ most plant cells are specialized to a greater or lesser degree‚ and arranged together in tissues. A tissue can be simple or complex depending upon whether it is composed of one or more than one type of cell. Tissues are further arranged or combined into organs that carry out life functions of the organism. Plant organs include the leaf‚ stem‚ root‚ and reproductive structures. The first three are sometimes called the vegetative
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sludge is further treated in ’sludge digesters’: large heated tanks in which its chemical decomposition is catalysed by microorganisms. The sludge is largely converted to ’biogas’‚ a mixture of CH4 and CO2‚ which is used to generate electricity for the plant. The liquid is treated by bacteria which break down the organic matter remaining in solution. It is then sent to oxidation ponds where heterotrophic bacteria continue the breakdown of the organics and solar UV light destroys the harmful bacteria. The
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A Plant Based Diet and its Ability to Support a 18-35 year old American | Philip Beckmann | Barbara Hiles Mesle 5/14/2012 | Introduction When I was growing up I was taught how to hunt‚ fish and trap animals for food as well as being fed an omnivorous diet‚ but today I have found that I no longer need animals in my diet. The Vegetarian Times recently found that out of the 311 million people in the US‚ 7.3 million eat a vegetarian based
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IB Biology HL Y1 15 January 2009 The Effect of Humidity on Transpiration in Plants Problem/Aim How does placing a plant in a more humid location for 50 minutes affect its rate of transpiration? Introduction Transpiration is the loss of water from a plant‚ mainly through the stomata of leaves. Darkness‚ internal water deficit‚ and extremes of temperature tend to close stomata and decrease transpiration; illumination‚ ample water supply‚ and optimum temperature cause stomata to open and increase
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Biology Assignment Transpiration rates between Exotic vs. Native plants In this investigation we will be looking at transpiration. The topic we will be focusing on is transpiration rates between native plants as well as exotic plants. We will be experimenting with 2 native plants as well as 2 exotic plants. The reason we are experimenting on this topic is because of Australia’s dry weather‚ we are wanting to find out which plants will be able to hold more water during Australia’s peaking tempretures
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effects of caffeine on plants are not as well developed. Many experiments were done on the effects of caffeine on plants yet; scientists are still confused on the topic. Plants are an important aspect of the ecosystem. Water‚ sunlight‚ and rich soil are all key elements of plant growth and development. Balance is an important concept in plant growth‚ too much or too little water is harmful to plant. Water helps the plant by giving it key nutrients. Without water the plant becomes physically weak
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Totipotent cells formed during sexual and asexual reproduction include spores and zygotes. Zygotes are the products of the fusion of two gametes. In some organisms‚ cells can dedifferentiate and regain totipotency. For example‚ a plant cutting or callus can be used to grow an entire plant. Human development begins when a sperm fertilizes an egg and creates a single totipotent cell called zygote. In the first hours after fertilization‚ this cell divides into identical totipotent cells. Approximately four days
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Plant Transport Plants are mostly made up of water. Lettuce is about 94% water and a potato is about 77% water. Plants need water for three main purposes: ------photosynthesis‚ -support -transport of chemicals Water is a raw material for photosynthesis. If water is in short supply‚ the rate of photosynthesis will be limited. Plants need water for support‚ otherwise they wilt. Water is needed to transport many chemicals within plants. Chemicals‚ such as mineral salts‚ dissolve in water and
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communities to become less dependent on groundwater and surface water sources. Additionally‚ water reuse may reduce the nutrient loads from wastewater discharges into waterways. This helps in reducing pollution and preserving the resources. In many cases the important sector of public health has been left alone when major upgrading projects improved the water supply systems in many countries and provinces. This basically ignored the downstream effect of improved water supply‚ that of increased discharges
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Plants and humans are perhaps the most important organisms‚ however‚ us humans‚ have caused the death of thousands of plants by starting fires and by cutting down trees for things such as paper and furniture. Plants make oxygen which is very important for our survival; we can’t live without it. In the year 2003 alone‚ 774500 acres of land‚ that contained not only threes but animals too‚ were burned in California (Jane Strong‚ 2003). Some of this land was burned due to natural fires but some of it
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