evoluAon of: • Movement of land mammals to ocean; • Feathers & flight in birds; • Vascular Assue in plants; • Upright posture & large brains in humans; • Jaws in vertebrates (animals w backbone) • Tetrapod limb (movement from water to land) aquaAc ‘fishapod’ Evidence: spp are related (common
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Question 1 2 out of 2 points Which of the following statements about meiosis is true? Selected Answer: a. The chromosome number in the resulting cells is halved. Question 2 2 out of 2 points The mitotic spindle Selected Answer: e. is composed of two different types of microtubules. Question 3 2 out of 2 points A chromatid is Selected Answer: e. one-half of a newly replicated eukaryotic chromosome. Question 4 2
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Which is bigger‚ a rhinovirus or E. Coli? E. Coli 3. Based on the magnification‚ how many of the E. Coli can fit into the same space as the head of a pin? 10‚000 E. Coli 4. About how many red blood cells could fit across the diameter of a human hair (again‚ look at the magnification scale)? about 100 blood cells? Experiment 2: Virtual Microscope 1. What is the first step normally taken when you look through the oculars? Adjust Oculars 2. What is the highest objective you
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rhinovirus or E. Coli? Answer: E. Coli 3. Based on the magnification‚ how many of the E. Coli can fit into the same space as the head of a pin? Answer: 2 Micrometers 4. About how many red blood cells could fit across the diameter of a human hair (again‚ look at the magnification scale)? Answer: 20 micrometers Experiment 2: Virtual Microscope Post-Lab Questions 1. After completing the m1 exercise in the “Try this” section‚ how tall is the letter e? Answer: about 1.8micrometers
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AP ESSAY ANSWERS: 16-20 1. Information transfer is fundamental to all living organisms. For TWO of the following examples‚ explain in detail‚ how the transfer of information is accomplished. A) The genetic material in one eukaryotic cell is copied and distributed to two identical daughter cells. B) A gene in a eukaryotic cell is transcribed and translated to produce a protein. C) The genetic material from one bacterial cell enters another via transformation‚ transduction or conjugation
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1. Bedbugs have been evolving in the United States since the 1940s and 50s. (1) Due to genetic mutations after World War II a widespread of pesticides known to be DDT was used. The genetic variation makes them resistant to the pesticides. (2) These DDT pesticides were used on the bedbug population‚ making them resistant to the pesticide. This illustrates natural selection because those resistant with the pesticide survive best. Which is heritable to their population with the resistant pesticide offspring
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Is gene therapy the most effective way to treat depression? What really is depression? The term ‘depression’ can be defined in two different ways: 1. Severe despondency and dejection‚ accompanied by feelings of hopelessness and inadequacy. 2. A condition of mental disturbance‚ typically with lack of energy and difficulty in maintaining concentration or interest in life.1 Majority of people believe that depression is somewhat trivial and is not regarded as a genuine health condition‚ but
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protein‚ chimpanzees and humans share an identical coding sequence. What other species identified on the chart has a coding sequence that is most closely related to the humans and chimpanzees and most distantly related? Explain your answer. The Pekin duck is the most closely related organism thats the most distant becuase it only has 3 differences in its coding sequence. CHART: Humans vs. Rhesus Monkey: 0 differences Humans vs. Horse: 3 differences Humans vs. Donkey: 3 differences
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B1a Fitness and health 1. You should be thinking about the differences between health and fitness‚ concentrating on the causes and prevention of heart disease‚ which is the most common cause of death in the UK. 2. Have ideas on encouraging a healthy lifestyle e.g. ways to reduce the risk of heart disease and high blood pressure e.g. give up smoking‚ avoid eating high levels of salt and avoid eating high levels of saturated fat. 3. Know that the risk of developing heart disease can be increased
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1. a) Describe the externalities that are shown in Figure 3.1 as a result of human economic activities. b) Connect the concept of externalities to market failure and illustrate with an example. (pp. 43-45) a – The externalities in this illustration are‚ as in most cases found “downstream” the main one here is the polluted river as a result of a few causes. The farm is causing pollutants to enter the stream and flow down river‚ as well as‚ the uncontrolled erosion taking place and
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