I need more help ASAP it’s just really confusing because I haven’t even learned this yet

All living things can sense and respond to stimuli in their environment. Stimuli might include temperature, light, or gravity. All living things grow and reproduce. Multicellular organisms grow by increasing in cell size and number. Prokaryotes are organisms whose cells lack a nucleus and other organelles.  Prokaryotic cells are surrounded by a plasma membrane, but they have no internal membrane-bound organelles within their cytoplasm. Multicellular organisms are larger, more efficient, and have a longer lifespan than unicellular organisms. Multicellular organisms need more resources than unicellular organisms. The cells are specialized and must depend on each other for survival of the organism. Although much smaller, unicellular organisms can perform some of the same complex activities as multicellular organisms. Many unicellular organisms live in extreme environments, such as hot springs, thermal ocean vents, polar ice, and frozen tundra. These unicellular organisms are called extremophiles. Do unicellular organisms have specialized cells?  A unicellular organism depends upon just one cell for all of its functions while a multicellular organism has cells specialized to perform different functions that collectively support the organism. I hope this helps explain.

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

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