Microorganisms

Bacteria

0.2 to 100 micron.

Bacilli: Rod shape (Escherichiacolli)

Cocci: Spherical (Streptococcus pneumoniae)

Vibrio: Comma shape (Vibrio cholerae)

Spirilla: Spiral shape (treponema pallidum)

Virus

Poisonous liquid, acellular both non living and living very small 20 - 300 nm. HIV , dengue, influenza, cow pox,

Rinderpest, head and mouth disease , tobacco mosaic, yellow vein mosaic.

Algae

Sea weed sea weed, spyrogyra, volvox, chlamydomonas, Have chlorophyll blue green algae nitrogen fixiation. Chlorella. Gellidium, Gracillaria

Protozoa

First animal, amoeba , paracmecium, euglena autotroph Protista

Fungi

Yeast, mould, mushroom. Penicillium

Red rot: sugarcane

Wilt: chickpea

Tikka: groundnut

Smut: wheat