Study Guides

Unit Summary

This unit explores cell structures, their functions, and differences between plant and animal cells. It includes adaptations of unicellular organisms and the organisation of multicellular organisms. Skills in using safe techniques, recording data, and evaluating methods in lab work are developed.

Lesson Summary

You will learn to explain the differences between multicellular and unicellular organisms.

Key Notes

• Unicellular organisms are made of a single living cell.
• Multicellular organisms are made of more than one cell (sometimes millions), and different cells take on different jobs.
• In multicellular organisms, cells join together to form tissues with specific jobs.
• An organ is a group of tissues working together to do a specific job, and organs work together in an organ system.
• Unicellular organisms have different structures that have adaptations to help them function and stay alive.

Vocabulary To Learn

• unicellular: A unicellular organism is a living thing that is just one cell.
• multicellular: Multicellular organisms are made of lots of different types of cells.
• tissue: A tissue is a group of similar cells in the same place with the same job.
• organ: An organ is made up of a group of different tissues that work together to carry out a specific job.
• adaptation: An adaptation is a feature that helps an organism to function and survive.

Common Mistakes To Avoid

• There are only two types of cell: plant and animal.

3 Quick Questions (With Answers)

More Lessons In This Unit

• Animal cell structures and their functions Study Guide
• Observing cells with a light microscope Study Guide
• Plant cell structures and their functions Study Guide
• Preparing and observing a microscope slide Study Guide
• Specialised cells are adapted for their functions Study Guide
• The common processes of all living organisms Study Guide