1. The Structures of the Human Heart The human heart has four chambers: two ventricles‚ each of which is a muscular chamber that squeezes blood out of the heart and into the blood vessels‚ and two atria‚ each of which is a muscular chamber that drains and then squeezes blood into the ventricles. The two atria reside at the top of the heart; the two ventricles are at the bottom. And‚ the heart is divided into left and right halves‚ so there is a left atrium and left ventricle‚ as well as a right atrium
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According to Reece et al. (2015)‚ animals can be described as organisms that are multicellular‚ heterotrophic eukaryotes that have tissues made from embryos. The difference between plants and animals are from their source of nutrients. Plants get their food by making them through a process called photosynthesis‚ which makes plants an autotroph. Animals‚ on the other hand‚ get their food by consuming other organisms and ingesting them‚ which makes them a heterotroph. Besides that‚ there are also variations
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Chitosan (11 KDa) showed a wide endothermic peak over wide range of temperature from 90.6°C to 146.7°C which can be attributed to water evaporation because polysaccharides are hydrophilic polymers that have a strong affinity for water. This result matched with the result of Ujang Z. et al. (2011) (133). And similar to all‚ the PM between CXB and 11 KDa chitosan (11 KDa chitosan:CXB 7:3) showed both the melting point
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making them even more better/worse. Bacteria that lives together are more effective as species. It allows them to protect each other‚ share food‚ and kills more efficiently. The complex organic glue that bacteria or other organisms produce is polysaccharides along with some proteins and nucleic acid and EPS held the biofilm together. Surrounding the biofilm with these substances helps cells develop complex three dimensional‚ resilient‚ and attached communities. That structure is very close to a substance
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1.1.1 In small unicellular organisms‚ substances move around slowly by diffusion. Diffusion is too slow to move substances round the larger bodies of multicellular organisms. They have a circulatory system: substances are carried in blood pumped by a heart. In a closed circulatory system (eg in vertebrates) blood is enclosed in narrow blood vessels. This increases efficiency: blood travels faster as a higher pressure is generated. Valves ensure blood flows in one direction:
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Oparin and Haldane’s Theory: The chemical evolution of life is the most widely accepted theory of origin of life. It is based on the fact that primitive earth was different from the earth which is present today. It was proposed by Russian bio-chemist‚ A.I Oparin (1923) and was supported by Englishman J.B.S Haldane (1928). This theory can be well-explained under the following headings: i. Biogeny ii. Chemogeny iii. Cognogeny 1. Formation of the earth: i. When the earth was formed‚ it was extremely
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Question 1 The subatomic particles that play the greatest role in cellular chemical reactions are Your Answer for Question 1 isotopes. Comments The correct answer is: electrons. Max Score: 5 Actual Score: 0 Question 2 The structural unit that retains the properties of an element is the Your Answer for Question 2 atom. Comments Correct!!
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There are different types of proteins. Fibrous proteins‚ for example‚ can be correlated with structure. Keratin is the main component of hair and nails that form protofibrils and consist of two pairs of alpha helices that are twisted together in a left-hand coil. The flexibility of keratin decreases as disulfide bond cross-links between protofibrils increases. Keratin is also found in skin and wool. Silk fibroin has the ability to form flexible‚ but the inextensive fibers are of great strength
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Gatorade (15 solutions). Then the lab was split altering 3 different variables (Time‚ Temperature‚ Enzyme amount). This illustrated the variable that had the biggest impact on the results. LAB QUESTIONS 1. No‚ it would not work because sucrose is a polysaccharides but this enzyme interacts with monosaccharides. This could only work if they were broken down or if a different enzyme was
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some reason‚ I never knew that sugar was part of carbohydrates‚ I thought that it was a part of fat. Anyways‚ something new that I learned that carbohydrates is divided into two categories: simple‚ monosaccharides and disaccharides; and complex‚ polysaccharides. One thing that I do recall on carbohydrates back when I took a health class‚ that carbohydrates contain 4 calories per gram and are converted into glucose indigestion. But surprising‚ one fact that I found to be very amazing was that simple carbohydrate
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