OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the population gets bigger
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individual organisms acquire new traits in their lifetimes
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the environment is unchanged
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the natural variations are present within a population
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Detailed explanation-1: -According to Lamarck, new needs (besoins) arise in animals as a result of a change in the environment. This leads to new types of behaviour involving new uses of pre-existing organs. Their use leads to an increase in size or to other methods of functioning. Conversely, the disuse of other parts leads to their decline.
Detailed explanation-2: -According to Lamarck, organisms altered their behavior in response to environmental change. Their changed behavior, in turn, modified their organs, and their offspring inherited those “improved” structures.
Detailed explanation-3: -Lamarck is best known for his Theory of Inheritance of Acquired Characteristics, first presented in 1801 (Darwin’s first book dealing with natural selection was published in 1859): If an organism changes during life in order to adapt to its environment, those changes are passed on to its offspring.
Detailed explanation-4: -What were the two main points of Lamarck’s theory of evolution? Lamarckian evolutionary theory states that over time, evolution turns simple organisms into complex organisms. It also states that the process of evolution was a natural force of nature and science, not divine.