What is the function of interstitial fluid?

Interstitial fluid can also be refers to as tissue fluid and it known as the solution that surrounds and bathes the tissue cells of multicellular animals. Interstitial fluids are the main components of extracellular fluid which also contain transcellular fluid and plasma. Also, interstitial fluid is found in space in between cells known as tissue space. They function by providing a means of delivering materials to the cells as and removal of metabolic waste.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.