KS3 Biology — Stem Cells in Animals — Full Worksheet

🧫 Build deep understanding of stem cells with this complete, no-prep 100-mark worksheet — ready to use for lessons, homework, or revision. Stem cells are unspecialised cells that can divide and develop into different cell types through a process called differentiation, and this resource covers them in depth for KS3 students aged 11–14.

📦 What's included:

Structured across three sections of progressive difficulty:

Section 1 (30 marks) — stem cell types, the zygote and embryo, differentiation, induced stem cells, and bone marrow through multiple choice, a true/false table, and fill-in-the-blank covering zygote, mitosis, genes, self-renewal, and leukemia

Section 2 (40 marks) — a matching activity, a sequenced description from fertilisation to embryonic stem cells, an embryonic vs adult stem cells comparison table, a gene-based explanation of differentiation, adult stem cell locations and functions, red blood cell production questions, an extended response on identical DNA producing different cells, and a bone marrow transplant question

Section 3 (30 marks) — extended discussions on embryonic vs adult and induced stem cells, differentiation as a one-way process, and a full evaluation of medical uses of stem cells including ethical issues

Full answer key with detailed marking guidance included.

🎬 Watch the free video lesson: https://www.youtube.com/watch?v=KYint8W1eYY

👩‍🏫 Google Classroom ready — copy the link straight into your assignment. Print as many copies as your class needs.

🔓 Also available as part of the Complete Lesson Pack, bundled with extension activities. Save £1 buying the pack (£3 + £3 = £6 separately, £5 together).

Price: £3