Question

advantages and disadvantages of microorganisms

Answer 1

microorganisms can be helping hand or a hazard to humans. this is is so as microbes like viruses are harmful and cause illness to bodies while good microbes like nitrogen fixing bacteria, mushrooms, some protozoa, lactobaccilus acidophilus,etc help humans and plants in many ways like providing nitrogen to plants, food and decomposing organic wastes, killing viruses, preparation of yoghurt respectively.

Hope this helps you. If you want more you may refer http://www.livestrong.com/article/26093-list-good-bacteria/
and http://www.healthhype.com/microorganisms-types-harmful-effects-on-human-body-pictures.html

Answer 2

disadvantages of microorganisms are 1. many pathogenic microbes cause disease.2. spoils our food.3. causes food poisining.4. some microbes convert soil nitrogen into free nitrogen making soil infertile.5. they can be used as biological weapons.Advantages- Microbes are useful in food preparation, medicinal purposes, cleaning the environment and nitrogen fixation. PLZZ MARKS as brillant answer.