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Discuss the nature of science, scientific inquiry and problem solving Analyze cellular design and function in plant, animal and bacterial cells Explore the structure of DNA and its relationship to the cell Evaluate forensic techniques
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Science is basically predictability It is using what we know today to give us the ability to predict certain things about the world around us
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Scientists use Critical Thinking Be Curious – look around and ask questions about things Be Skeptical – don’t always believe the first thing you hear Be Flexible – even after you have found one explanation, keep looking, you may find an even better one later
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Scientists use the Scientific Method Observation –carefully watching something around us Hypothesis – an educated guess explaining what you are observing Experiment – testing your hypothesis by designing and carrying out an experiment Conclusion – judging on the basis of your experiment if your hypothesis is right or wrong
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Experimental – the group in the experiment that is tested Control – the group in the experiment that stays the same
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Correlation – two things happen together Cause Effect - one thing or event actually causes the other to happen
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All living matter is made up of one or more cells. Also, any cell alive today had its origin in a preexisting cell
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Plant cells have cell walls Plant cells have chloroplasts that contain chlorophyll Plant cells have larger vacuoles than Animal cells Animal cells contain centrioles Many animal cells have flagellum to help with movement
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Bacteria are prokaryotes, they do not have a well-defined nucleus Bacteria cells contain a single closed DNA circle Need a microscope to see them Bacteria come in three shapes ◦ Cocci (round) ◦ Bacilli (rod-shaped) ◦ Spirilla (spiral-shaped)
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A gene is a unit of information that can be passed on to offspring They are a powerful influence on physical and mental characteristics As powerful as genes are, however, it’s important to remember that environment also helps shape organisms
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Genes are usually either dominant or recessive ◦ A dominant gene is expressed in the offspring no matter what gene the other parent contributes ◦ A recessive gene is expressed in the offspring only if both parents contribute recessive genes
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A genome is an organism’s complete set of DNA Except for mature red blood cells, all human cells contain a complete genome
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DNA contains a phosphate group that attaches to base pairs The four base pairs of DNA are: ◦ Adenine (A) ◦ Thymine (T) ◦ Guanine (G) ◦ Cytosine (C) Remember A only attaches to T and G only attaches to C!!!
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Forensic comes from the Latin word forensis. Forensic science is science used in public, in court or in the justice system. Any science, used for the purposes of the law, is a forensic science.
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1. Firearms and tool marks 2. Forensic profiling 3. Document examination 4. Autopsy 5. DNA typing 6. Forensic Anthropology 7. Odontology 8. Blood
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