Track quiz
Here are the seven rules. Use the table if you get stuck.
| Idea | The rule |
|---|---|
| Too many to list | Classification means sorting living things into groups by shared features. Change the feature, and the groups change. |
| A feature that splits cleanly | A good feature gives a clear yes-or-no answer for everyone. A feature that is a matter of degree draws no clear line. |
| What decides a group | Inherited — a feature passed from parent to offspring. A feature that appears only in one life is not. |
| Groups inside groups | A smaller group always sits inside a larger one. Every member of the smaller group belongs to the larger group too. |
| Five large groups | Three questions, asked in order, sort most living things. Cell type first, then cell number, then how it feeds. A chitin wall marks a fungus, even a one-celled yeast. |
| Two names for every kind | A scientific name has two parts: genus, then species. It names one kind everywhere, in every language. Give the genus a capital and the species a small letter. Use italics in print. |
| The things that do not fit | A virus has no cells, so the first question fails. It is not placed in any of the five kingdoms. |
Six animals are grouped by diet, then by movement. What changes?
Which question splits a cow, a sparrow and an earthworm cleanly?
A thorny plant's seed grows into a plant with thorns. What kind of feature is this?
A tiger and a lion share the genus Panthera. What else must they share?
A cell keeps its DNA loose in the cytoplasm. Which kingdom is it in?
How is the mango’s scientific name written correctly?
A virus has genetic material but no cells. Why does it fit no kingdom?
Chapter 12 of your Class 9 book is Exploration. It is Patterns in Life: Diversity and Classification. Read it this week.
Next comes Earth as a System: Energy, Matter, and Life.