Maybe I need the adjective after the missing word!
Like do you mean they are example of which cells or what!
But if you mean cells, then they are an example of somatic cells and I don't guess they have any other category in common.
Answer:
bacteria
Explanation:
they can reproduce and adjust it's surrounding nature
Water is a polar covalent molecule. That is because it shares electrons between the atoms unequally.
Answer:
Parasitism; a tapeworm lives in the small intestines of a human, causing the human to get sick.
Explanation:
The true meaning of Parasitism is something that lives inside of something that can cause it to be sick or leave behind bacteria