LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What idea did Larmarck propose that was later proven to be incorrect?
A
All species are descended from a common ancestor
B
There is a relationship between an organism and its environment
C
Living organisms change over time
D
Acquired characteristics can be inherited
Explanation: 

Detailed explanation-1: -Lamarckism, a theory of evolution based on the principle that physical changes in organisms during their lifetime-such as greater development of an organ or a part through increased use-could be transmitted to their offspring.

Detailed explanation-2: -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-3: -Wrong: Organisms inherit changes that occurred to their parents’ bodies during their parents’ lifetimes. It is correct that evolution occurs over generations of reproduction, but Lamarck was incorrect in thinking that traits developed over a lifetime will be passed along to offspring.

Detailed explanation-4: -Lamarckism is considered as a wrong concept because the characters acquired by an organism during its lifetime due to use or disuse do not affect the genetic makeup of the organism. They are simply phenotypic changes.

Detailed explanation-5: -d. Organisms are adapted to their environments. Lamarck proposed that acquired characteristics can be inherited. If an organism had altered its body structure during its lifetime, this characteristic can be passed onto its offspring.

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