Cell Membrane and Transport

The cell membrane is a thin, flexible, semipermeable layer that surrounds the cell, regulating what enters and exits. It serves as a protective barrie

Cells must move materials in and out to survive. This process, known as cell transport, allows nutrients to enter, waste to exit, and essential molecu

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. This process occurs in liquids and gases an

Osmosis is the movement of water molecules across a selectively permeable membrane from an area of low solute concentration (fewer dissolved substance

Cells need to move substances in and out to maintain balance and function properly. Passive transport is a process that allows molecules to move acros

Cells need to move substances in and out to maintain balance and function properly. Active transport is a process that requires energy to move molecul

Seeds are tiny packages that hold the beginning of a new plant’s life. Each seed contains a baby plant, known as an embryo, stored food, and a protect