AP BIOLOGY

Detailed explanation-1: -Answer: Based on the notes that Joy took, it is likely that the structure that her class was studying is the cell membrane. The cell membrane, also known as the plasma membrane, is a thin, flexible barrier that surrounds the cell and separates the inside of the cell from the outside environment.

Detailed explanation-2: -Cell Membrane (Plasma Membrane) The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable.

Detailed explanation-3: -The plasma membrane is the boundary of the cell, made up of lipids and proteins, and controls the substances entering or leaving the cell.

Detailed explanation-4: -The plasma membrane is the border between the interior and exterior of a cell. As such, it controls passage of various molecules-including sugars, amino acids, ions, and water-into and out of the cell.

Detailed explanation-5: -Final answer: The outermost boundary of an animal cell is called the plasma membrane.