Biology · Grades 7–10
Microorganisms and classification · Revision sheet
Avoid treating all microbes as harmful or all microbes as bacteria.
Learn the idea
Diversity
Microorganisms include bacteria, many fungi and protists; viruses are studied alongside them but are not cells.
Bacteria
Bacteria are prokaryotic cells without a membrane-bound nucleus.
Roles
Microbes can act in decomposition, food webs and beneficial associations as well as disease.
Safety
Use descriptions and supplied data; do not culture or handle unknown microbes for this worksheet.
Explain without looking
- Why is a worksheet not a reason to grow an unknown environmental sample at home?
- Which information best supports classifying an organism?
Further reading and review references
- openstax.org · reference 1
- www.genome.gov · reference 2
- www.genome.gov · reference 3
- www.genome.gov · reference 4
- www.genome.gov · reference 5
- www.genome.gov · reference 6
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Independent educational review required. Grade bands are approximate; these are not officially aligned curricula.