Question

cells are the simplest living units of all organisms. they are known as the \building blocks\ of life. some organisms, like bacteria, are made of just one cell. humans are multicellular organisms, which means they are made of many cells.
complex multicellular organisms like humans contain cells that are organized into increasingly complex internal structures: tissues, organs, and organ systems. these structures carry out the functions of life.
select the true statements.
humans are made of many cells.
cells can combine to form complex structures.
all living things are made of cells.
all organisms contain organs.

Explanation:

• The text states humans are multicellular (made of many cells).
• It notes cells in complex organisms organize into tissues, organs, organ systems (complex structures).
• The opening defines cells as the simplest living units of all organisms, meaning all living things are made of cells.
• Not all organisms have organs (e.g., single-celled bacteria), so the final statement is false.

Answer:

1. Humans are made of many cells.
2. Cells can combine to form complex structures.
3. All living things are made of cells.