Prokaryote
unicellular organism lacking a nucleus.
Bacillus
rod-shaped prokaryote.
Coccus
spherical prokaryote.
Spirillum
spiral or corksrew-shaped prokaryote.
Chemoheterotroph
organism that must take in organic molecules for both energy and carbon.
Chemoautotroph
organism that make organic carbon molecules from carbon dioxide using energy from chemical reactions.
Photoautotroph
organism that uses energy from sunlight to convert carbon dioxide and water to carbon compound.
Photoheterotroph
organism that is photosynthesis but needs organic compounds as a carbon source.
Obligate aerobe
organism that require a constant supply of oxygen in order to live.
Obligate anaerobe
organism that cannot live in the presence of oxygen.
Binary fission
type of a sexual reproduction in which an organism replicate its DNA and divides in half, producing two identical daughter cell.
Conjugation
form of sexual reproduction in which paramecia and some prokaryotes exchange genetic information.