because with the starting snail population there was a great variation from 1-7. After the crab began eating only the snails with the thickest shells survived. The snails with the thinnest shells were eaten by the crab. Only snails with shell thickness 4-7 were left after the crab had their meal. The original snails with thickness 1-3 were eliminated from the population by the crab. The crab will usually try to expend as little enrgy as it can to maximaize its happiness so the snails with thinner shells
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Extended experimental investigation: effects on membranes of environmental stress Background It is not possible to observe membranes directly‚ so this investigation is an indirect study of the effects of different substances and treatments on living beetroot cells. Beetroot cells have been chosen for this activity because each beetroot cell has a large central vacuole bounded by a membrane (Figure 1). Contained in the vacuole is the red pigment anthocyanin‚ which gives the beetroot its
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Genetic Traits Exercise: Introduction: The pioneer of modern day genetics was an Austrian Monk named Gregor Mendel‚ who established the basic laws of heredity from his studies with pea plants in the late 1800s. Mendel’s fundamental genetic principles may be applied to a variety of traits from many different organisms. Each genetic trait‚ such as flower color‚ is regulated by a pair of genes called alleles. These alleles are found at particular places on the chromosomes called loci. During meiosis
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1. Read the press release on the 2001 Nobel Prize. Summarize in a few paragraphs the accomplishments of these scientists‚ and the relevance of their discoveries. (Answer in 500 words or less. Send to instructor) The Nobel Prize in Physiology or Medicine 2001 was awarded jointly to Leland H. Hartwell‚ Tim Hunt and Sir Paul M. Nurse "for their discoveries of key regulators of the cell cycle". They have identified key molecules that regulate the cell cycle in all eukaryotic organisms‚ including
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Arrangement of Vascular Tissues in Flowering Plants • Xylem and phloem often are grouped together -> vascular bundle • Cambium -> lies in between xylem and phloem -> divide and differentiate -> form new xylem and phloem tissues -> thickening of stem Movement of Substances Into and Within Flowering Plants Entry of Water and Nutrients into Plants • Absorption of water -> root hairs -> grow into close contact with liquid around them • Thin film of liquid surrounding soil
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Homework Title: Photosynthesis and Respiration 1) Define these terms and arrange them from smallest to largest: Ch 5 WIO #3 • Thylakoid membrane Answer: Thylakoid membrane is a compartment in a plant cell that has light pigment that carry out the photosynthesis process. • Chloroplast Answer: Chloroplast is a type of organelle found in plants and algae that carry our photosynthesis. • Reaction center Answer: Reaction center is where chlorophyll a molecule and other
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results can be angina and coronary heart disease. 3. Starvation Too little food can result in starvation. Extreme slimming diets‚ such as those that avoid carbohydrate foods‚ can result in the disease anorexia nervosa. Starvation 4. Childhood protein-energy malnutrition (Kwashiakor): Wrong proportion of nutrients e.g. too much carbohydrates (starchy foods) and a lack of protein can lead to Kwashiakor in young children. Kwashiakor characterized by edema‚ anorexia‚ ulcerating
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Many times‚ Type 2 diabetes can be managed with medication instead of insulin injections. A third type of diabetes include one that it onset to woman during pregnancy. This is known as gestational diabetes‚ and can be temporary. It occurs in about 4% of pregnant woman‚ and may lead to other diseases. It is being researched that this type of diabetes may be triggered by the fetus. Finally‚ diabetes is a serious disease‚ especially because we do not know everything about it. Environmental factors
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JOHN BAPST HIGH SCHOOL NAME : Luis Adrian Vega Alvarez PERIOD: 5 COURSE : Junior 1. Background 1.1. One of the most vigorously debated topics on Earth is the issue of climate change‚ and the National Environmental Satellite‚ Data‚ and Information Service (NESDIS) data centers are central to answering some of the most pressing global change questions that remain unresolved. The National Climatic Data Center contains the instrumental and paleoclimatic records that can precisely
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Biology Lab Report 7 “Independent Assortment & Dihybrid Cross” 10-22-2013 Biology 202 Introduction: In genetics‚ when crossing a purebred white flower with a purple flower‚ we might expect its offspring to be a blend of both colors. Instead‚ we see that its offspring is purple as well. This is led to be by one trait being dominant over another trait. Gregor Mendel came up with a theory that each member of a pair of homologous chromosomes separates independently
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