9.2 - Maintaining a Balance: 1. Most organisms are active within a limited temperature range: * Identify the role of enzymes in metabolism‚ describe their chemical composition and use a simple model to describe their specificity in substrates: * Role of enzymes in metabolism: * Metabolism refers to all the chemical reactions occurring in organisms * Enzymes are biological catalysts which increase the rate of chemical reactions * Without enzymes‚ metabolism
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its stomata to allow diffusion of the gas into its leaves. However when a plant does this it also results in loss of water‚ as water vapour diffusing out of the leaves. Lost water however is drawn up through the xylem through a process called transpiration. Water is able to move in opposition to gravity due to the negative pressure of the vessels‚ and the cohesion-tension property of water‚ which allows water molecules to “stick together” and influence the movement of another water molecule. If it
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1.) Roots support photosynthesis and respiration by absorbing minerals and water and by storing organic nutrients. They also anchor the plant. Some roots have mycorrhizae‚ which increase the surface area and therefore increase the absorption. The endodermis‚ which is the innermost layer of cells in the root cortex‚ surrounds the vascular cylinder. It is the passage of minerals from the cortex into the vascular tissue. The stem has a system of nodes where leaves are attached. They have a waxy
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Biology Notes - Ecology and Eco-Systems Environment It is everything that surrounds you. It includes all natural living and non-living things that are included within the environment. All living organisms depend on the natural environment they live in. A natural environment is very different to a man made environment because a man made environment is heavily influenced by people whereas a natural environment is effected by people by a very small amount. Ecosystems An area containing
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Lab Report Useful links http://www.psychwww.com/tipsheet/labrep.htm http://mhhe.com/biosci/genbio/maderinquiry/writing.html https://owl.english.purdue.edu/owl/section/2/10/ A scientific report usually consists of the following: 1. Title 2. Abstract 3. Introduction 4. Materials and methods 5. Results 6. Discussion 7. Literature cited Title The title should be less than ten words and should reflect the factual content of the paper. Scientific titles are not designed to catch
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Discuss why hydrogen bonding is essential for life Throughout biochemistry there are many bonds without which life as it is on earth today would not be possible. One of the most important bonds of these is the hydrogen bond‚ a weak chemical bond that is present in essential biological molecules such as water and polypeptides. A hydrogen bond is defined by Campbell and Reece as occurring when a hydrogen atom is covalently bonded to an electronegative atom but attracted to another electronegative
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Subject: Geography Name: Muhammad Umair e-mail id: hafizumair92@gmail.com Climate of Pakistan: Introduction: Pakistan lies in the temperature zone. The climate is varied throughout the country‚ characterized by hot summer and cold winter. The rainfall occur in the upper parts of the Pakistan is usually from the Western Disturbance. From June to September most of the country is lashed by the South West Monsoon. Pakistan has recorded one of the highest temperatures in the world Mohenjo-daroo
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Environmental Engineering Course Description: Ecological framework of sustainable development; pollution environments: water‚ air‚ and solid; waste treatment processes‚ disposal‚ and management; government legislation‚ rules and regulation related to the environment and waste management; and environmental management s...ystem. Pre requisite: General Chemistry Course outline: 1 Ecological Concepts 1.1 Introduction to Environmental Engineering 1.2 Ecology of life 1.3 Biogeochemichal
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The Biological Structure of Water Water is a substance with the chemical formula H2O: one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. Its structure enables it to carry out many important functions in the body. Water molecules are charged‚ with the oxygen atom being slightly negative and the hydrogen atoms being slightly positive. These opposite charges attract each other‚ forming hydrogen bonds. These are weak‚ long distance bonds that are very common and
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Process of Diffusion and its importance in living organisms Diffusion is the movement of molecules or ions down a concentration gradient i.e. from an area of high concentration to an area of low concentration. For a diffusion system to be efficient‚ it should have a large surface area so that high amount of substances can be exchanged at a time. It should also have a thin membrane and a continuous supply of substances‚ as a thin membrane means that the diffusion pathway would be short‚ and the continuous
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