Was Lamarck's theory correct

Answer 1

Lamarck was correct about the connection between the environment and evolution. He saw that the organism changes based on the environment and its survival. However, Lamarck is not well-known for his advances in the field. Instead, he is known for the incorrect mechanisms for evolution that he proposed, including "use and disuse" and "inheritance of acquired characteristics." (A small note, Lamarck definitely did not have a "theory," he had hypotheses).

Answer 2

Lamarck's theory of evolution is mostly not accepted by the scientific community today. It was complex, with many smaller pieces that may be true, but his major premise, that acquired traits can be passed on genetically, is false. If you cut off your arm, you will not have one armed children. This distinction gets blurry if you start to take epigenetics into account, but these changes are generally on a very small scale, and difficult to study.

Answer 3

No, Lamarck's hypotheses were wrong. He hypothesised that if an organism uses/exercises an organ, then it will increase in size and strength, and this increase will be passed onto its offspring. One example would be giraffes, stretching their necks to reach higher sources of food, and then giving birth to offspring with even longer necks. Conversely, if a limb is disused, then it may shrink or disappear.

We now know this is incorrect, and Lamarckianism was replaced by evolution by natural selection. Organisms show variation across the species, advantageous variations are passed on to that organism's offspring. To use the giraffe example, if food becomes scarce, the giraffes with slightly longer necks will be able to feed, the ones with shorter ones may die, the genes for longer necks are the ones getting passed onto offspring, and the overall result is the average neck size of the colony will increase.

Answer 4

It is true that certain anatomical structures change in size according to use, but these changes cannot be passed on to the organism's offspring

Answer 5

nothing is right

Answer 6

Living things change every time