A molecule of water consists of one oxygen and two hydrogen atoms joined by covalent bonds. Water as a liquid is vital to existence and plays extremely important roles in many aspects of both plant and animal lives. These aspects include temperature control‚ support‚ chemical reactions‚ transport and protection. Without the ability to control our temperature‚ we as humans would not be able to survive in our natural environment. If our internal body temperature was to rise or fall even a few degrees
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Meiosis I Prophase I: - nuclear membrane dissolves * centrioles move to poles * spindle fibres forming * DNA has been replicated and forms chromosomes made of 2 identical chromatids * Homologous chromosomes line up to form a bivalent‚ 2 chromosomes or 4 chromatids (TETRAD)‚ this process is called SYNAPSIS * Where chromatids overlap is called a CHIASMATA‚ and it allows for CROSSING OVER of genetic information between chromosomes Metaphase I: - homologous chromosomes
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Adenosine Triphosphate‚ also known as ATP‚ is the molecule responsible for the energy that we‚ and all other organisms‚ need to survive. It is produced primarily in the processes of aerobic and anaerobic respiration by oxidative and substrate phosphorylation. 4 molecules of ATP are produced from 4 ADP and 4 inorganic phosphates in glycolysis in the cytoplasm of every cell‚ by the oxidation of a triose phosphate into two molecules of pyruvate. In anaerobic respiration these are the only 4 ATP
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Mitosis Lab Mitosis in Onion Root Tips Make a sketch of a representative cell in each of the four stages of mitosis in the space provided below. Prophase Metaphase Anaphase Telophase Can you distinguish any cells? Yes‚ you can identify cells that are undergoing development. In prophase‚ the chromosomes make and x shape. In metaphase‚ the chromosomes are moved to the middle of the cell. In anaphase‚ the chromosomes look like they are being pulled apart. And in telophase‚ the cell starts
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Mitosis in a Nutshell • The stages of the cell cycle can be broken down into six stages: o Interphase‚ Prophase‚ Metaphase‚ Anaphase‚ Telophase Interphase • Is the "resting" or non-mitotic portion of the cell cycle. • It is comprised of G1‚ S‚ and G2 stages of the cell cycle. • DNA is replicated during the S phase of Interphase Prophase - the first stage of mitosis. • The chromosomes condense and become visible • The centrioles form and move toward opposite ends of the cell ("the poles")
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more visible in aquatic environments such as streams‚ lakes‚ and marshes. Many lakes and rivers are already acidic without the effects of acid rain. Their pH levels go up to 6 and 8. Once a stream or lake has been affected by acid rain‚ the organisms living in the aquatic environment begin to die out. The solution to decreasing the amount of damages acid rain has on the environment is to lower the sulfur
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understanding of living organisms There are 2 types of microscopes these are; light microscope and electron microscope. Light microscopes use a beam of light however the resolution is lower than the electron microscope so the image is not clear‚ however they can view living organisms. These types of microscopes are used in schools to view simple cellular structures‚ which is good to teach simple biology Mitosis and meiosis can be seen with light microscopes. the different stages of mitosis; when the spindle
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Introduction: Mitosis occurs in all eukaryotic cell tissues and produces genetically identical daughter cells with a complete set of chromosomes. In humans‚ mitosis produces somatic cells that are diploid‚ which means they contain two non-identical copies of each of the twenty-three chromosomes. One copy is derived from the person’s mother and the other from the person’s father. Meiosis‚ on the other hand‚ occurs only in testis and ovary tissues‚ producing sperm and ova (eggs). The gametes that
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Abstract Acid Rain has a lot of effects on living organisms and on the environment. This experiment has two purposes. One is to determine the acidity of rainwater in certain areas in the Philippines. Another purpose is to determine which type of area-urban or rural- is more subjected to acid rain. The experiment was done by first collecting rainwater from selected rural and urban areas. After the collection was done‚ the rainwater samples were tested using a pH meter. The results of the pH test
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All organisms that are considered to be alive must possess certain key characteristics or functions. These include: order‚ response to the environment‚ reproduction‚ growth and development‚ regulation‚ energy processing and evolution. Since we recognize life by what living things do‚ these seven characteristics serve to define life. Organisms consist of one or more cells and while they may be very complex they are highly organized and coordinated. Inside each cell‚ atoms make up molecules.
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