Blank are the basic unit of structure and function that all living things are made of A organs B cells C plasma membranes or D tissues

B cells

The basic unit of structure and function that all living things are made of is B) cells.

The correct answer is B) cells.

To arrive at this answer, you need to have a basic understanding of the components of living organisms. Cells are the fundamental units of structure and function in all living things. They are the building blocks of life and provide the structural and functional foundation for organisms.

To reason through this question:

1. Eliminate wrong options:
- Option A) Organs: While organs are composed of cells, they are not the basic unit of structure and function for all living things.
- Option C) Plasma membranes: While plasma membranes are a component of cells, they are not the basic unit of structure and function for all living things.
- Option D) Tissues: Tissues are composed of cells, but they are not the basic unit of structure and function for all living things.

2. Identify the correct answer: Option B) Cells is the only option left, and it aligns with our basic understanding that cells are indeed the basic unit of structure and function for all living things.

Therefore, the correct answer is B) cells.