Domain (biology)

High school (ages 12+)
Animals & Nature

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/domain-biology

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the proposed by?Carl Woese based on ribosomal RNA analysis
2. What is the defining feature of eukarya?Presence of a nucleus and membrane-bound organelles
3. What are the three biggest boxes for living things called?The three biggest boxes are called domains. They are Bacteria, Archaea, and Eukarya.
4. Why do scientists use domains instead of just two kingdoms?Scientists use domains because tiny molecules called ribosomal RNA show that life splits into three big groups, not just two. This helps us see how all living things are related.

Ribosomal RNA (rRNA): A type of RNA molecule found in ribosomes, crucial for protein synthesis and evolutionary studies.
Phylogenetic Tree: A branching diagram showing the inferred evolutionary relationships among various biological species or other entities.
Endosymbiosis: A symbiotic relationship where one organism lives inside another, often leading to evolutionary integration.