Bacteria and Viruses

ISBN: 9780756963866

作者: Michael Crumpton

出版社: Perfection Learning

出版年: 2007-1

页数: 40

定价: $ 21.41

装帧: SAL

内容简介

Bacteria are single-celled organisms with the ability to help and harm other living things. Viruses can reproduce only in host cells, often causing infections.