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Literature & Language
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Life on Earth Essay (Essay Sample)

Instructions:
ASSIGNMENT 06 SC160 Basic Biology Directions: Unless otherwise stated, answer in complete sentences, and be sure to use correct English spelling and grammar. Sources must be cited in APA format. Your response should be one (1) single-spaced page in length; refer to the "Assignment Format" page for specific format requirements. On page 410 of your textbook, there is a summary statement concerning what scientists believe about the origin of life on earth. Summarize the three (3) current competing theories of the origin of life on Earth: it arrived from an extraterrestrial source, it originated as a heterotroph, it originated as an autotroph. This is the end of Assignment 06. source..
Content:
Life on Earth Students Name: School Name: Life on earth How life originated on earth is a question that people have pondered for ages. Scientists have tried to answer this question through many theories and experiments. One of the first hypotheses to explain the origin of life on earth was proposed by Aristotle (383-322 B.C.) and it was widely accepted until the seventeenth century. He proposed spontaneous generation, the concept that living things arise from nonliving things. As time passed, people began to question this long-held belief and proposed an alternative idea, called biogenenis. This is the concept that life originated only from preexisting life. An experiment was carried out by a scientist named Redi and he challenged spontaneous generation where he demonstrated that maggots did not come from decaying meat, but from eggs of flies. Several hypotheses have been carried out to prove if it is true that living things come from living things. Today there are three competing theories of the origin of life on Earth that is; the extraterrestrial source, heterotroph origin and autotroph origin. Extraterrestrial life is defined as life that does not originate from earth. Consequently there are hypotheses that have supported this theory which are as follows :Panspermia is an hyp...
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