Jean-Baptiste Lamarck (1744-1829), a French scientist who believed in evolution,
ID: 188483 • Letter: J
Question
Jean-Baptiste Lamarck (1744-1829), a French scientist who believed in evolution, is known for Lamarckism, or inheritance through acquired characteristics. He argued that environmental influ- ences could put pressure on animals, making them use some characteristics more and some less, and that the changes acquired by the parents would be passed to the next generations. A common example of this theory is that giraffes could actually grow longer necks by straining to get to higher and higher branches for food, and that the offspring of these longer-necked giraffes would have longer necks at birth. 1. Is this argument at the level of a hypothesis or is it a theory? Why? a. b. How would you set up an experiment to test Lamarck's beliefs? c. What would be your dependent variables? d. What would be your independent variable?Explanation / Answer
a. A hypothesis is either a suggested explanation for an observable phenomenon, or a reasoned prediction of a possible causal correlation among multiple phenomena whereas a theory is a tested, well-substantiated, unifying explanation for a set of verified, proven factors.So Lamarckism is the hypothesis that an organism can pass the characteristics that it has acquired by the giraffe during its lifetime to its offsprings.
b. To test Lamarck 's beliefs, i will set up the Weismann experiment in which tails of mice will be removed for a remarkable number of generations bur there was no reduction in size of their tails and also no wound is inherited to the next generation.
c, My dependent variable would be the mice taken for the experiment that is affected during the experiment.
d. My independent variable would be the tails of the mice that is brought to face a change because independent variable is the cause .
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