Multicellular organisms grow by increasing the number of cells they have; this involves cell division.

An organism that consists of only one cell.

The process by which cells replicate to produce two genetically identical cells.

Growth in multicellular organisms

Biology

The cell cycle and cell division: mitosis

Observing mitosis in plant cells using a light microscope

The structure of DNA: including nucleotides

Errors in cell division and cancer: beyond the basics

Making gametes: meiosis

Pupils will learn about unspecialised cells in animals and plants, how they become specialised, and potential benefits and issues with using stem cells in medicine. 

Pupils learned about dominant and recessive alleles, and how to use models of single gene inheritance to make predictions about the genotypes and phenotypes of offspring.

This unit covers mitosis and the cell cycle in growth, cancer as uncontrolled cell division, and the role of mutations in genetic variation. It explains meiosis in gamete formation and chromosome reduction. The emphasis is on recording observations and interpreting patterns to draw conclusions.

Cell division: mitosis and meiosis

It controls what enters and exits the cell.

Which statements are true for the nucleus?

Which two processes do animal and plants usually use cell division for?

Two cells are produced with half the DNA.

Two genetically identical cells are produced.

Four cells are produced from the original cell.

Which of these statements are true for cell division in animals?

What is the word used to describe organisms increasing in size by adding more cells?

Bacteria use cell division for growth and repair.

Match each term to the correct defintion.

If in the same organism, order these structures from smallest to largest. 

Which sub-cellular structure contains the DNA in animal cells?

Which of these organisms is multicellular?

Which word best describes an organism increasing in size as part of their life cycle?

What is the smallest living organism that can exist on its own?

Growth in multicellular organisms

Lesson outcome