CORE PRACTICAL ONE Describe how the effect of caffeine on heart rate in Daphnia can be investigated practically‚ and discuss whether there are ethical issues in the use of invertebrates. Daphnia‚ the water flea‚ is a small freshwater crustacean which lacks physiological methods of maintaining a constant body temperature. This means that if the environmental temperature changes‚ its body temperature does so too and its metabolic rate will be expected to rise or fall accordingly. So the temperature
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In the Kingdom Exploration lab‚ five different organisms were observed under a microscope‚ (Yeast‚ Paramecium‚ Elodea‚ Daphnia‚ Euglena). Each of these organisms is apart of one of the six kingdoms‚ (Eubacteria‚ Archaebacteria‚ Fungi‚ Protista‚ Plantae‚ and Animalia) which are apart of three domains‚ (Archaea‚ Bacteria‚ and Eukarya). In this lab‚ however‚ none of the organisms observed were archaea or bacteria. Also‚ all the organisms were eukaryotes‚ not prokaryotes‚ which are organisms without
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known for their hardiness as well as flamboyant coloring (Champan et. Al 1998). The prey in question is the Daphnia‚ a large group of small planktonic crustaceans which can also exist in almost any freshwater body (Ebert 2005). The predatory nature of the Tetra will be put into question in two scenarios. One where the Tetra can easily find its prey in a two-species interaction with the Daphnia. And another where the Tetra will have to spend time and energy searching for its prey in the presence of
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r = 1/week a= 0.01/copepods/week f= 0.01 copepods/prey q= 0.1/ week An experimental lake was initiated with 1000 algae cell/m3 and 10 Daphnia/m3. A. The model predicts that at these densities‚ the algae density will initially _________ (3pts) a. increase b. decrease c. not change B. The model predicts that at these densities the Daphnia density will initially _______ (3pts) a. increase b. decrease c. not change C. Based on this model the per-capita death rate of copepods _________
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Succession‚ the process of a community changing over time‚ can be broken down into sub groups such as ecological‚ primary‚ pond‚ and secondary. Ecological succession being the most basic. In the Succession Lab‚ we observed a community in a ecosystem. As we recorded the data each class‚ we observed that succession takes place with rapid speed for in each observation‚ a new specimen is identified. A niche is how the organisms live‚ what their role in the community is. For example‚ an ecological
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Does caffeine affect heart rate? Background Information: Caffeine is a bitter white crystalline xanthine alkaloid that acts as a psychoactive stimulant drug. A German chemist‚ Friedrich Ferdinand Runge‚ discovered it in 1819. Plants produce caffeine as an insecticide. It is found in varying quantities in the beans‚ leaves‚ and fruit of over 60 plants‚ where it acts as a natural pesticide that paralyses and kills certain insects feeding on the plants. Cocoa in South America‚ coffee in Africa
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■ HSW 1.2: Criteria 2‚ 3‚ 4‚ 5‚ 8 and 10 – The effects of temperature on heart rate in Daphnia Criterion 2: Using knowledge to pose scientific questions‚ define problems and present arguments and ideas What knowledge of the biology of Daphnia is essential to the design of this experiment? Criterion 3: Using appropriate methods to answer scientific questions and solve problems Why are Daphnia cultures ‘pre-incubated’ for 5 minutes under specified conditions‚ prior to experimentation?
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the citation should be as follows: Jumping ability in fleas is correlated with resting metabolic rate (Krasnov et al.‚ 2004). Mills‚ E.L.‚ and J.L. Forney. 1983. Impact on Daphnia pulex of predation by young yellow perch in Oneida Lake‚ NewYork Saegrov‚ H.‚ A. Hobaek‚ and J.H. Labeelund. 1996. Vulnerability of melanic Daphnia to brown trout predation Zaret‚ T.M. 1980. Predation and freshwater communities. Yale University Press‚ New Haven‚ CT.
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Adeel Saim Ghaus Magna International Introduction Magna International Company targets income and growth through long standing partnerships and potential investments. Magna conducts its business through integration‚ ethical values and commitment and is one of the most automotive suppliers in the world. It is one of the largest automobile manufacturer in North America and one of the largest companies in Canada. Magna operates with 294 manufacturing divisions and 87
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make a democratic government‚ and grant people the right they deserve. Those three documents were: The Magna Carta‚ Declaration of Rights of Man and Citizens‚ and the U.S. Bill of Rights. The Magna Carta establishes and protects rights such as limited government and rule of law of self-government; that was extended further by the document of The Declaration of Rights of Man and Citizen. The
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