Eukaryoottisilla

Eukaryoottisilla refers to organisms belonging to the domain Eukarya. Eukaryotic cells are characterized by the presence of a membrane-bound nucleus and other organelles, such as mitochondria and chloroplasts. This is in contrast to prokaryotic cells, which lack these structures. Eukaryotes encompass a vast diversity of life, including animals, plants, fungi, and protists.

The defining feature of eukaryotic cells is their compartmentalization. The nucleus houses the cell's genetic material in the form of chromosomes, which are complexed with proteins called histones. Organelles like mitochondria are responsible for cellular respiration, generating ATP, the energy currency of the cell. In photosynthetic eukaryotes, chloroplasts carry out the process of converting light energy into chemical energy.

The evolutionary history of eukaryotes is marked by endosymbiosis, a theory suggesting that some organelles, like mitochondria and chloroplasts, originated from free-living prokaryotes that were engulfed by ancestral eukaryotic cells. This symbiotic relationship eventually led to the organelles becoming an integral part of the eukaryotic cell. Eukaryotic organisms exhibit complex multicellularity, with cells differentiating to perform specialized functions, leading to the development of tissues, organs, and organ systems. Their reproduction can be either asexual through processes like mitosis or sexual through meiosis.