_____A_____ worked on rats and cut their tails off for 21 generations. Howewever, the next generation of rats still possesses normal tails. By this experiment, he disapproved of the theory of ______B_____. He proposed a new theory called the _____C_____.
_____A_____ worked on rats and cut their tails off for 21 generations. Howewever, the next generation of rats still possesses normal tails. By this experiment, he disapproved of the theory of ______B_____. He proposed a new theory called the _____C_____.
The correct option is D A: August Weismann
B: Inheritance of acquired characteristics
C: Continuity of Germplasm
August Weismann had worked on rats; he cutt their tails for 21 generations but found that still all the subsequent rats in the later progeny had normal tails. He performed this experiment to disprove the theory of inheritance of acquired characteristics of Lamarckism and instead proposed that only changes acquired by the germplasm (the part of the body involved in gamete production) could be inherited. This is known as the theory of continuity of germplasm.
Louis Pasteur disproved the theory of spontaneous generation (according to which life can be formed from any non-living objects) by conducting the swan-necked flask experiment. He statied that life arises from preexisting life form (biogenesis).
Lamarck proposed one of the earliest theories of evolution. Though evidences he showed that existing life forms have evolved from common ancestors. This was against the established theory of special creationn, which argued that organisms are created as such and there is no evolution. Lamarck gave a concept that all the characters acquired by an organism, during its lifetime, gets inherited to the offspring.
B: Inheritance of acquired characteristics
C: Continuity of Germplasm
August Weismann had worked on rats; he cutt their tails for 21 generations but found that still all the subsequent rats in the later progeny had normal tails. He performed this experiment to disprove the theory of inheritance of acquired characteristics of Lamarckism and instead proposed that only changes acquired by the germplasm (the part of the body involved in gamete production) could be inherited. This is known as the theory of continuity of germplasm.
Louis Pasteur disproved the theory of spontaneous generation (according to which life can be formed from any non-living objects) by conducting the swan-necked flask experiment. He statied that life arises from preexisting life form (biogenesis).
Lamarck proposed one of the earliest theories of evolution. Though evidences he showed that existing life forms have evolved from common ancestors. This was against the established theory of special creationn, which argued that organisms are created as such and there is no evolution. Lamarck gave a concept that all the characters acquired by an organism, during its lifetime, gets inherited to the offspring.
