Biology Domains and Kingdoms Flashcards

Questions and Answers

What are the 3 domains of life?

Viruses, Bacteria, and Fungi

Plants, Animals, and Fungi

Bacteria, Archaea, and Eukarya (correct)

Prokaryotes, Eukaryotes, and Archea

How are organisms placed in domains and kingdoms?

Based on their cell type, their ability to make food, and the number of cells in their bodies.

Describe Domain Bacteria.

They are prokaryotes, found all around, can be autotrophs or heterotrophs, harmful or helpful, give vitamins and nitrogen, and are unicellular.

What are prokaryotes?

Cells that lack a nucleus. Signup and view all the answers

What is a nucleus?

The dense area in a cell that contains nucleic acids. Signup and view all the answers

What are nucleic acids?

The chemical instructions that direct a cell's activities. Signup and view all the answers

Describe Domain Archaea.

They are unicellular prokaryotes that live in extreme environments, with a chemical makeup that differs from that of bacteria. Signup and view all the answers

Describe Domain Eukarya.

They are eukaryotes with cells that have nuclei, classified into 4 kingdoms: Protists, Fungi, Plants, and Animals. Signup and view all the answers

What are Protists?

Eukaryotes that are not classified as animals, plants, or fungi, including unicellular and some multicellular organisms like seaweed. Signup and view all the answers

What are Fungi?

Multicellular eukaryotes that are heterotrophs, including mushrooms, molds, and yeast. Signup and view all the answers

Describe Plants.

Multicellular autotrophs that provide food for heterotrophs on land, including a great variety of organisms. Signup and view all the answers

Describe Animals.

Multicellular heterotrophs that adapt to locate and consume food. Signup and view all the answers

Study Notes

Domains of Life

Three domains: Bacteria, Archaea, and Eukarya.

Classification Criteria

Organisms are classified based on cell type, food-making ability, and number of cells.

Domain Bacteria

Comprises prokaryotic organisms found in diverse environments.
Includes both autotrophs (organisms that produce their own food) and heterotrophs (organisms that consume others).
Most are beneficial, aiding in processes such as vitamin and nitrogen production.
Primarily unicellular in structure.

Prokaryotes

Cells that do not possess a nucleus.

Nucleus

A dense area within a cell that contains nucleic acids.

Nucleic Acids

Chemical substances that provide instructions for cellular activities.

Domain Archaea

Consists of tiny, unicellular prokaryotes often found in extreme environments, such as hot springs.
The term "Archaea" derives from Greek, meaning "ancient."
Includes both autotrophs and heterotrophs; distinct from bacteria due to unique chemical characteristics.

Domain Eukarya

Encompasses eukaryotic organisms with nuclei in their cells.
Divided into four kingdoms: Protista, Fungi, Plantae (Plants), and Animalia (Animals).

Kingdom Protista

Comprised of diverse eukaryotic organisms that don't fit into animal, plant, or fungi categories.
Members can be autotrophs or heterotrophs, with most being unicellular and some, like seaweed, being multicellular.

Kingdom Fungi

Multicellular eukaryotes that include organisms like mushrooms, molds, and mildew.
A few unicellular members, such as yeast, are also included.
All fungi are heterotrophs, often decomposing dead organisms for nourishment.

Kingdom Plantae (Plants)

Consists of multicellular organisms that are exclusively autotrophic.
Serve as a primary food source for heterotrophic organisms, offering significant ecological variety.

Kingdom Animalia (Animals)

Composed entirely of multicellular organisms that are heterotrophic.
Adaptations facilitate finding, capturing, and digesting food.
Animals inhabit multiple environments across the globe.

Description

Explore the essential concepts of the three domains of life: Bacteria, Archaea, and Eukarya. This quiz will help you understand how organisms are classified into these domains and their unique characteristics. Perfect for students studying biology!