What is Malaria? (Knowing more on how to deal with Malaria) A. History of Malaria Although the parasite responsible for P. falciparum malaria has been in existence for 50‚000–100‚000 years‚ the population size of the parasite did not increase until about 10‚000 years ago‚ concurrently with advances in agriculture and the development of human settlements. Close relatives of the human malaria parasites remain common in chimpanzees. Some evidence suggests that the P. falciparum malaria may have originated
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Introduction to Biochemistry Biochemistry : a multidisciplinary science that explores the chemistry of living organisms and molecular basis for changes occurring in living cells. Principal areas of Biochemistry 1. Struture and Function of Biomolecules Based on structure depend the function (structure function relationship) Example: Hemoglobin S differs from regular adult hemoglobin (hemoglobin A) by just one single amino acid. A valine replaces a glutamine in the 6th position of the beta
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Chapter 27. BACTERIA & ARCHEA Overview: Prokaryotes thrive almost everywhere‚ including places too acidic‚ salty‚ cold‚ or hot for most other organisms Masters of Adaptation Most prokaryotes are microscopic‚ but what they lack in size they make up for in numbers There are more in a handful of fertile soil than the number of people who have ever lived They have an astonishing genetic diversity Prokaryotes are divided into two domains: bacteria and archaea Structural‚ functional‚ and genetic
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we get some of our fish‚ shellfish‚ and seaweed to eat and sell. Another field is Toxicology. Toxicology observes water quality and studies contaminants or pollutants in marine environments. The final type of Marine Biology is the study of Protists. Protists are single-celled organisms that serve as food for single-cell microscopic organisms that could affect the entire food chain if killed
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Name: Date: 10/14/2013 1. What types of molecules have difficulty crossing the plasma membrane? Explain why. Large polar molecules and
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c------------------------------------------------- Evidence for Endosymbiotic theory: ------------------------------------------------- Evidence that mitochondria and plastids arose from bacteria is as follows:[13][14][15] * New mitochondria and plastids are formed only through a process similar to binary fission. * In some algae‚ such as Euglena‚ the plastids can be destroyed by certain chemicals or prolonged absence of light without otherwise affecting the cell. In such a case‚ the
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Eukaryotic vs. Prokaryotic cells Prompt: Describe the similarities and differences between Prokaryotic and Eukaryotic cells. All organisms are made of cells. The cell is the simplest collection of matter that can be alive. Cells are the basic structural and functional units of every organism. Cells fall into two distinct types: Prokaryotic and Eukaryotic. While Prokaryotic and Eukaryotic cells are similar in that both types of cells are bounded by a plasma membrane‚ all contain cytosol‚ and all
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Alternation of generations is a reproductive cycle of certain plants‚ fungi‚ and protists. The term is a bit confusing for people familiar only with the life cycle of a typical animal. A more understandable name would be "alternation of phases of a single generation" because we usually consider a generation of a species to encompass one complete life cycle. The life cycle of organisms with "alternation of generations" is characterized by each phase consisting of one of two separate‚ free-living organisms:
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In the process of cell division‚ these chromosomes are duplicated in a process called DNA replication. This process fully furnishes each cell with its full-required set of chromosomes. In eukaryotic organisms (animals‚ plants‚ fungi‚ and protists)‚ most of DNA is stored inside the cell nucleus and partly inside organelles; the examples of the latter are mitochondria or chloroplasts [2]. On the contrary‚ in prokaryotes (i.e.‚ bacteria)‚ DNA is stored just in the cytoplasm. It should be added
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unicellular fungi. Unicellular organisms fall into two general categories: prokaryotic organisms and eukaryotic organisms.Unicellular organisms are believed to be the oldest form of life‚ possibly existing 3.8 billion years ago.[2] Prokaryotes‚ most protists‚ and some fungi are unicellular. Although some of these organisms live in colonies‚ they are still unicellular. These organisms live together‚ and each cell in the colony is the same. However‚ each cell must carry out all life processes in order
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