Answer:

(a)Electromagnets are used in all kinds of electric devices, including hard disk drives, speakers, motors, and generators, as well as in scrap yards to pick up heavy scrap metal. They're even used in MRI machines, which utilize magnets to take photos of your insides!

(b)Binary fission-The term “fission” indicates “to divide”. Through binary fission, the parent cell divides into two cells. ... Example: Amoeba and euglena exhibit binary fission. It is one of the simplest and uncomplicated methods of asexual reproduction

Multiple fission-Multiple fission is the process of asexual reproduction in which instead of 2 daughter cells, many daughter cells are produced from the parent cell. In this, the nucleus undergoes repeated division to produce a large number of nuclei. Each nucleus along with little bit of cytoplasm forms a membrane around it.