Final answer:
Microorganisms are a diverse group of life forms that include bacteria, fungi, archaea, plants, and animals, all of which exist in a wide range of environments and are energized primarily by the sun.
Step-by-step explanation:
Microorganisms are a form of life that lives and grows everywhere on our planet. In terms of diversity, they may manifest as single-celled entities or as complex, multicellular organisms. This group includes plants, animals, fungi, bacteria, and archaea. Microorganisms display a wide array of forms and functions, exemplified in how a creature like a caterpillar transforms into a butterfly, demonstrating the life cycle stages of organisms. All these organisms, nevertheless, have a unifying cellular structure, vary from simple prokaryotes like bacteria to sophisticated multicellular life forms, and they all rely on energy to survive.
Most life on Earth, inclusive of prokaryotes, remains relatively simple and single-celled. The complexity of multicellular life forms is incredible, starting from a single cell that forms from the fusion of an ovum and sperm. Microorganisms are so prevalent that they are considered ubiquitous, thriving in virtually all environments including extreme ones preferred by organisms like Crenarchaeota. Moreover, these microorganisms are foundational to ecosystems, with many bacteria forming biofilms in nature.
Overlying this diversity is a synopsis that requires all life to possess cellular structures and an energy supply. The majority of energy harnessed by life is initially captivated by photosynthesis in green plants. It is particularly noteworthy that the energy sustaining life primarily originates from sunlight, transformed into chemical energy stored in organic molecules.