Sourav PanApril 30, 2025

What was before the three domain system?

Sourav PanApril 30, 2025

Answered

Before the three-domain system, the prevalent classification system was the five-kingdom model proposed by Robert Whittaker in 1969. This system categorized life into five kingdoms: Monera (prokaryotes), Protista, Fungi, Plantae, and Animalia. The five-kingdom system was based on observable characteristics such as cell structure, mode of nutrition, and reproduction. However, this classification did not account for the genetic and molecular differences discovered later, particularly between prokaryotic groups, leading to the development of the three-domain system.

Did this page help you?

Start Asking Questions Cancel reply

Quiz Leaderboard

1st

Meenakshi

Score: 100%

Questions: 20

2nd

Debabrata

Score: 100%

Questions: 20

3rd

BandzzzzTheONESIMELANE

Score: 95%

Questions: 20

4th

Nischal

Score: 90%

Questions: 10

5th

Priyanka

Score: 90%

Questions: 10

6th

Sourav

Score: 90%

Questions: 20

7th

OTLOTLENG

Score: 70%

Questions: 10

8th

Martin

Score: 65%

Questions: 20

9th

Meenakshi

Score: 55%

Questions: 20

10th

Meenakshi

Score: 55%

Questions: 20

Click "Create Mock Test" to start a quiz.
Select categories and the number of questions, then click "Submit" to begin.
After completing the quiz, enter your name and email, then click "Submit" to view your score.
Your score is shown as a percentage (e.g., 5 correct out of 10 is 50%).
The leaderboard displays your name, score percentage, and total questions answered.

Click here to Create Mock Test