1
a nonliving, infectious agent that cannot reproduce without a host, obtain or use energy, or respond to the environment
Virus
a unicellular, living organism that lacks a nucleus and membrane-bound organelles
Prokaryote
a living organism whose cell or cells contain nuclei and membrane-bound organelles
Eukaryote
a large molecule synthesized by cells that form the structures of cells and perform the functions of life
Biomolecule
a small structure inside a cell that is surrounded by a membrane and performs a specific function
Membrane-bound organelle
the theory of how organelles (mitochondrion, chloroplast) arose in organisms
Endosymbiotic theory
the theory that life on Earth arose from nonliving things through natural processes
Abiogenesis
the idea that living things can only arise from other living things
Biogenesis
a type of biomolecule that performs many functions in the cell, including providing energy and structural support
Carbohydrate
a type of biomolecule that includes DNA and RNA, which store and transmit genetic information
Nucleic acid
a type of biomolecule that performs many functions in the cell, including energy storage and cell membrane structure
Lipid
a type of biomolecule that performs many functions throughout an organism, including providing structure and facilitating chemical reactions
Protein