Two plants can be conclusively said to belong to the same species if they:
Two plants can be conclusively said to belong to the same species if they:
have more than 90 per cent similar genes
look similar and possess identical secondary metabolites
have same number of chromosomes
can reproduce freely with each other and form seeds.
Solution
Two organisms are said to belong to same species if they can interbreed among themselves to produce fertile offspring. In the case of plants, seeds represent the embryonic structure of the plant which later develops into offspring. So, the correct option is 'Can reproduce freely with each other and form seeds'.