Introduction to Protists, Viruses, Cryptogams and Spermatophytes

This text is designed for students in the introductory years of Diploma and Degree courses in Applied Biological Sciences, Botany, Plant Science, Zoology, Medical Science, Microbiology and other Science related courses at Polytechnics and Universities in Nigeria and abroad. The book is divided into five parts and comprises of thirteen chapters, which include; Introduction, Protozoa, Viruses, Bacteria, Fungi, Actinomyctes, Algae, Lichens, Mycorrhizae, Bryophytes, Pteridophytes, Gymnosperms and Angiosperms. The body of this text includes; the definition, characteristic features, classification, reproduction, economic importance etc of the various topics. There was deliberate attempt to include at least, where possible, an animal or a plant example to any feature that was described in the book. Original citations are included since these permit students and researchers alike to examine the original source. Some references were also obtained from most recent text and internet. Photographs used in the text were obtained from internet (Wikipedia and Wikimedia).