Science Class: Vocabulary #4 (Viruses and Monerans)

Definitions:

Virus: it is made of chromosome-like part surrounded by a protein coat.
Host: is an organism that provides food for a parasite.
Parasite: is an organism that lives in or on another living thing and gets food from it.
Interferon: is a chemical substance that interferes with the way viruses reproduce.
Vaccines: substances made from weakened or dead viruses.
Bacteria: very small, one-celled monerans.
Colony: a group of similar cells growing next to each other that do not dependon each other.
Capsule: bacteria`s sticky outer layer.
Flagellum: long whiplike thread.
Fission: the process of one organism dividing into two organisms.
Asexual reproduction: the reproducing of a living thing from only one parent.
Endospore: is a thick-walled structure that forms inside the cell, enclosing the all the nuclear material and some cytoplasm.
Saprophytes: are organism that use dead materials for food.
Decomposers: living things that get their food from breaking down dead matter into simpler chemicals.
Koch`s postulate: are steps for proving that a disease is caused by a certain microscopic organism.
Communicable diseases: diseases that can be passed form one organism into another.
Antibiotic: are chemical substances that kill or slow the grouth of bacteria.
Biotechnology: the use of living things to solve practical problems.
Pasteurization: the process of boiling milk to kill harmfull bacteria.
Blue-green bacteria: small, one-celled monerans that contain chlorophyll and can make their own food.