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 complex multicellular organisms have cells organized into tissues, organs, organ systems, meaning cells form complex structures.
• The opening line defines cells as the simplest living units of all organisms, so all living things are made of cells.
• The text specifies single-celled organisms like bacteria exist, which lack organs, so "All organisms contain organs" 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.