How are the modes of reproduction different in unicellular and multicellular organisms?

Unicellular organisms are the single-celled organism. These organisms reproduce by asexual mode of reproduction i.e by the process of binary fission, multiple fission, budding, or cyst formation. In this case of reprouction nucleus get divided into two equal parts.

Multicellular organisms are a complex organism which has function specific organs like plants, mammals etc. Complex multicellular organisms reproduce sexually that involves fusion of gamete/ sex cells from parents. e.g. pollination in plant.