Please help me ASAP I’ll mark

1: the Nucleus

2: Human bodies have upward of 37 trillion, most of which can only be seen under a microscope. Other organisms, however, have only one cell in their entire body, and humans can see some of these single-cell organisms with the naked eye. Human egg cells, unusually large bacteria, some amoebas and squid nerve cells make up this list.

3: Cells come in different shapes—round, flat, long, star-like, cubed, and even shapeless. Most cells are colorless and see-through. The size of a cell also varies.

4:    Protecting the integrity of the interior cell. Providing support and maintaining the shape of the cell. Helps in regulating cell growth through the balance of endocytosis and exocytosis. The cell membrane also plays an important role in cell signalling and communication.  

5: in the nucleus.      ?

6: Each part has a specific job to do. And as each part does its special job, it works in harmony with all the other parts. The arrangement of specialized parts within a living thing is sometimes referred to as levels of organization. Cells, of course, are the first level of organization. In any multicellular organism, cells rarely work alone.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.