de petits agents qui peuvent se multiplier dans d’autres organismes comme les animaux, les plantes ou les bactéries. L’organisme dans lequel le virus se multiplie est appelé l’hôte.
appelés parasites essentiels. Cela signifie qu’un hôte est essentiel pour eux.
divisés en trois catégories : ceux qui infectent les animaux, les plantes ou les bactéries
composé de trois parties principales : génome, capside, enveloppe lipidique externe
Certains scientifiques soutiennent que les virus ne devraient pas être appelés organismes car il n’est pas convenu s’ils sont vivants ou non.
Chaque virus peut se propager d’une manière différente.
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