Biology Three Domains of Life Quiz

Questions and Answers

What are the three domains of life?

Bacteria, Archaea, and Eukarya.

These domains are based on?

The cellular composition of organisms.

Which of the following statements about Bacteria is true?

Bacteria are eukaryotic organisms.

Bacteria lack a membrane-bounded nucleus. (correct)

Bacteria reproduce sexually.

Bacteria are multicellular.

Which of the following is NOT a characteristic of Archaea?

Membrane-bounded nucleus Signup and view all the answers

What are the characteristics of Eukarya?

Eukaryotic, unicellular to multicellular organisms with a membrane-bounded nucleus. Signup and view all the answers

What are the requirements of living things?

Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition. Signup and view all the answers

What are the four kingdoms?

Animalia, Plantae, Fungi, and Protista. Signup and view all the answers

What is the binomial naming system?

A system that combines two names to give each species a unique scientific name. Signup and view all the answers

What are dichotomous keys used for?

To identify organisms. Signup and view all the answers

What are the three characteristics used to classify organisms?

Physical characteristics, reproductive methods, and molecular sequencing. Signup and view all the answers

What are the types of symmetry?

Both A and B Signup and view all the answers

What is classification?

The arrangement of animals and plants in taxonomic groups according to their observed similarities. Signup and view all the answers

Study Notes

Three Domains of Life

Bacteria, Archaea, and Eukarya represent the three domains of life.
Domains are classified based on cellular composition.

Bacteria

Prokaryotic and unicellular organisms.
Lack a membrane-bound nucleus.
Asexually reproduce.
Nutritional methods include:
- Heterotrophic by absorption.
- Autotrophic through chemosynthesis or photosynthesis.
Movement typically by flagella.

Archaea

Also prokaryotic and unicellular.
Lack a membrane-bound nucleus.
Asexually reproduce.
Nutritional types vary; many are autotrophic by chemosynthesis, with some being heterotrophic.
Distinctive features include:
- Unique rRNA base sequence.
- Specific plasma membrane and cell wall chemistry.

Eukarya

Eukaryotic organisms, ranging from unicellular to multicellular.
Possess a membrane-bound nucleus.
Mainly reproduce sexually.
Exhibits diverse phenotypes and nutrition.
Each kingdom within Eukarya has specific specializations.
If flagella are present, they have a 9+2 organization.

Requirements of Living Things

Essential characteristics include:
- Movement
- Respiration
- Sensitivity
- Growth
- Reproduction
- Excretion
- Nutrition

Four Kingdoms

Kingdoms within the Eukarya domain:
- Animalia
- Plantae
- Fungi
- Protista

Binomial Naming System

Provides unique scientific names for species by combining two names.
- The first name is the genus.
- The second name represents the specific epithet.

Dichotomous Keys

A tool for identifying organisms that requires a choice between two options.

Characteristics for Organism Classification

Key features used to classify organisms:
- Physical characteristics
- Reproductive methods
- Molecular sequencing

Symmetry Types

Radial symmetry: symmetrical regardless of how cut in half.
Bilateral symmetry: symmetrical only with one specific cut.

Classification

The systematic arrangement of animals and plants into taxonomic groups based on observed similarities.

Description

Test your knowledge on the three domains of life with this quiz. Explore the characteristics and differences between Bacteria, Archaea, and Eukarya. Perfect for biology students looking to solidify their understanding of cellular composition.