3. In three to five sentences, compare the process of digesting food in an amoeba (unicellular) to that of a mouse (multicellular).
The process of digesting food in an amoeba and a mouse involves both extracellular and intracellular digestion. In an amoeba, food is ingested through phagocytosis, where the cell engulfs food particles with its cell membrane forming a food vacuole. The vacuole then fuses with lysosomes containing digestive enzymes to break down the food into smaller particles, which are then absorbed into the cytoplasm.
In a mouse, digestion begins in the mouth where food is physically broken down by chewing and chemically by salivary enzymes. The food then moves to the stomach where it is further broken down by stomach acid and enzymes. Nutrients are absorbed in the small intestine through villi, then transported to different parts of the body through the bloodstream.
Overall, while both amoebas and mice utilize a combination of intracellular and extracellular digestion, mice have specialized organs and systems that allow for a more complex and efficient process of digesting food compared to amoebas.