lesson 4 Unicellular Organisms Worksheet + Answers
KS3 Year 7 Biology worksheet on unicellular organisms: amoeba, euglena, paramecium and binary fission. Diagrams, practical and full answers included.
Lesson 4 of a five-lesson KS3 Cells unit. Use it for a class lesson, cover, revision, homework or home study.
What students do: a retrieval starter, vocabulary and a short reading text. They label an amoeba, euglena and paramecium, and complete sequence diagrams for how an amoeba feeds and how binary fission works. A table compares unicellular and multicellular organisms. Short-answer questions have marks shown. The challenge task includes a population-doubling question and a design-your-own-organism activity. The practical observes yeast and uses magnification maths.
Teacher answer key: labelled diagrams, model answers with mark points (61 marks), common misconceptions, three verbal check questions and a 50-minute timing plan.
Details: 6-side student pack plus 5-side key, A4, with original diagrams. Foundation, core and challenge tasks, with sentence starters and word banks. Dyslexia-friendly layout, UK spelling.
Check the practical against your school’s risk assessment before use. These are worksheets, not lesson plans or slides.






