The answer is the idea of mutations was understood by both but Lamarck was able to prove it.
Uh...that it will have the same genetic makeup as the plant it came from? or that it's asexual? dont really know what u need here.
B. requires flowers.
Sexual reproduction is one type of biological reproduction wherein the genitals of the male and female organisms engage into a sexual activity in order for the sperm cells to fertilize the egg cells of the females.
In the case of most plants, they engage in asexual reproduction. Asexual reproduction happens outside the body system of a cell.
Moreover, this process is extrinsic than its opposite the sexual reproduction which happens in the female reproductive system.