Question

1. compare: how do unicellular organisms and multicellular organisms compare in meeting their needs to stay alive? (what do these organisms do to ensure their survival?)

Explanation:

Unicellular organisms rely on a single - cell to perform all life - sustaining functions like obtaining nutrients (by diffusion or active transport), gas exchange, and waste removal. Multicellular organisms have specialized cells, tissues, and organs for different functions. For example, in animals, the digestive system gets nutrients, the respiratory system for gas exchange, and the excretory system for waste removal.

Answer:

Unicellular organisms use a single cell for all life processes such as nutrient uptake by diffusion. Multicellular organisms have specialized cells, tissues, and organs for functions like digestion, respiration, and excretion to ensure survival.