sábado, 9 de abril de 2011

Virues and Monerans

Virus: it is made of chromosomes-like part sorruonded by a protein coat.

Host: is an organism tbhat provides food for a parasite.

Parasite: is an organism that lives in or on an other living thing and gets food from it.

Interferon: is a chemical subtance that interfers with tha way viruses reproduce.

Vaccines: sustance made from weakened or dead viruses.

Bacteria: very small, one-celled monerans.

Colony: a group of similar cells growing naxt to each other that do not dependon each other.

Capsule: bacteria´s sticky outer layer.

Flagellum:  long whiplike thrad.

Fission: the process of one organism dividing into two organisms.

Asexual reproduction: the reproduction of a living thing from only one parent.

Endospore:is a thick-walled structuire that forms inside the cell, enclosing the all of the nuclear material and some cytoplasm.

Saprophytes: are organism that use dead materials for food.

Decomposers: living hing that get their food from breaking down dead matter into simpler chemicals. 

Koch´s postulate:are steps for proving thta a desease is caused by a certain microscopic organism.

Comunicable desease: deseas that can be passed from one organism into another.

Antibiotic:are chemicals subtances that kill or slow the grouth of bacteria.

Biotechnology: the use of living things to solve practical problems.

Pasteurization: tha process of boiling milk to kill harmfull bacteria.

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


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