Vocabulary #4

virus: is made of a chromosomes-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 the way viruses reproduce.

vaccine: are substances made from wakened or dead viruses.

bacteria: are very small, one-celled monerans.

colony: is a group of similar cells growing next to each other.

capsule: some bacteria have a sticky outer layer.

flagellum: some bacteria move with a long, whiplike thread.

fission: is the process of one organism dividing into two organisms.

asexual reproduction: is the reproducing of a living thing from only one parent.



endospore: is thicky-walled structure that forms inside the cell.

saprophytes: are organisms that use dead material for food.

decomposers: are living things that get fet their food from breaking down dead matter into simpler chemicals.

Koch's postulates: are steps for proving that a disease is caused by a certain microscopic organism.

communicable diseases: are ones that can be passed from one organism to another.

antibiotics: are chemical substances that kill or slow the growth of bacteria.

biotechnology: is the use of living things to solve practical problems.

pasteurization: the process of heating milk to kill harmful bacteria.

blue-green bacteria: are small, one-celled monerans that contain chlorophyll and can make their own food.