Animal Diversity The number of animal varieties familiar to us is vast as the animal world is diverse. Each distinct variety or type of animals is recognized by scientist as a species. Animals of most species are free-living forms but of others are parasitic in bodies of other animals or even plants. According to their habitats animals are divided into the following types Aquatic animals :- They live in water . Animals living in sea water are called marine & those live in river‚ponds‚streams
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Internet and answer the questions that follow. 1 Thalidomide is a drug which was sold during the 1950s[->0] and 1960s[->1] as a sleeping aid and given to pregnant women to combat morning sickness[->2] and other symptoms. It was made in West Germany[->3] in 1953[->4]. It was available in around 50 countries‚ although not in the United States[->5]‚ under at least 40 different names. 5 It was later (1960–61) found to cause severe physical abnormalities in the unborn child (foetus). These abnormalities
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investigation • used to check paternity / who is the father / mother / parent • used to check whether two organisms are clones 2. Discuss whether genetic screening should be carried out for sickle cell‚anemia and other diseases. 4 marks. 3. Discuss the advantages and disadvantages of genetic screening. 8 marks. Genetic testing can cause either a feeling of relief or anxiety‚ depending on the outcome of the test results. Ultimately‚ testing provides individuals with an opportunity to seek
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Aerobic Respiration Breaking down glucose to release energy Products are Carbon dioxide and water Diffusion is … the movement of molecules from a region of high concentration to a low concentration until the concentration is equal. Role of a human circulatory system: Diffuse In – oxygen (O2)‚ dissolved food (glucose) and water (H2O) Diffuse Out – carbon dioxide (CO2)‚waste and water(H2O) Respiration – releasing energy in cells Breathing – getting air into and out of your body
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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 will likely be targeted first and eventually eliminated. 17.1 When predatory
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IB Home Standard Level Higher Level Options Additional Resources 8.2 Photosynthesis 8.2.1 Draw and label a diagram showing the structure of a chloroplast as seen in an electron micrograph 2D Representation 3D Representation Electron Micrograph 8.2.2 State that photosynthesis consists of the light-dependent and light-independent reactions Photosynthesis is a two-step process: 1. The light dependent reactions convert the light energy into chemical energy 2. The light
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that occurs as the heart contracts. There are two phases of the cardiac cycle. In the diastole phase‚ the heart ventricles are relaxed and the heart fills with blood. In the systole phase‚ the ventricles contract and pump blood into the arteries. 3 Lymphocytes Lymphocytes are the main white blood cells in the vertebrate system that is responsible for immunity. Their main function in the body is the production of antibodies that help to fight bacteria and other disease-carrying agents. 4
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lizard’s body temperature has risen from low 10 to 30 degree Celsius. And so echidna’s body temperature has risen from mid-30 to mid-40 degree Celsius. They are true ectotherms as they could not have maintained that constant internal body temperature. 3. Suggest why there is an advantage to both endotherms and ectotherms in having a warm body temperature (within limits). The warm body temperature will help them maintain their body at a metabolically favourable temperature at which the body enzymes
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_______________________________________________________________________ A - your body remembers how to do what you practiced over the day. _______________________________________________________________________ Fueling the Body - Fats and Carbohydrates Q-how many calories are in 3 large hamburgers?_______________________________________________________________________ A - 3000
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the levels of life’s organizational hierarchy from smallest to largest‚ starting with atoms and ending with the biosphere. Atoms‚ molecules‚ organelles‚ cells‚ tissues‚ organs‚ organ systems‚ organism‚ population‚ community‚ ecosystem‚ biosphere 3. What are the roles of natural selection and mutations in evolution? The roles of natural selection and mutations in evolution are that natural selection leads to adaptations which help populations survive‚ and mutations generate the variation needed
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