Domains of Life: Eukarya

Today, you will learn about the third domain of life, Eukarya. You will view specimens of organisms from this domain using the microscope. The organisms in this domain are very different from Archaea and Bacteria. Continue on to learn more.

Domains of Life: Eukarya

​Would you rather have to high-five everyone you see or hug everyone you see?

Draw

List the three domains

​Classification Flocabulary Jam

​The Three Domains

-Bacteria
-Archaea
-Eukarya

​Every single living organism will fall into one of these categories. I need a volunteer to pick any living thing that you know of. (It can be as crazy as you want, but it has to be a real live living thing.) We are going to look at how it is classified.

​Eukarya

Eukarya is one of the domains of life. Organisms in the domain Eukarya have a more complex cell structure than bacteria or archaea. The domain Eukarya is divided into four kingdoms:

• Protista

• Plantae

• Fungi

• Animalia

These four kingdoms contain the living things you are most familiar with. A eukaryote is an organism that is part of the domain Eukarya.

Eukaryotes have a complex cell structure compared to bacteria and archaea.

​Eukaryotic cells contain many structures that are surrounded by membranes. One of these structures is the nucleus. A nucleus is a structure within a cell that stores the cell's DNA. Recall that DNA contains information about how the cell will look and function. Every eukaryote contains cells with a nucleus.

​Nucleus

​Multicellular

​The organisms in the Archaea and Bacteria domains are always unicellular, or composed of one cell. Some eukaryotes are also unicellular.

However, many eukaryotes are multicellular, or composed of many cells. The cells in a multicellular organism work together to keep it alive. Often, a multicellular organism has different types of cells that perform different jobs. This rockhopper penguin is multicellular.

All multicellular organisms are eukaryotes, but not all eukaryotes are multicellular.

​Macroscopic

​Recall that macroscopic means large enough to see with your eyes. Many eukaryotes are macroscopic. Macroscopic organisms include:

• trees

• bears

• insects

• mushrooms

This kelp, which grows in the ocean, is a macroscopic eukaryote.

All macroscopic organisms are eukaryotes, but not all eukaryotes are macroscopic.

​The Four Kingdoms of the Domain Eukarya Video

​Grab your microscope, and locate slide number 4. The slide is titled "Freshwater Fish Gills"

Let's observe this slide under the microscope and begin to understand how cells are arranged within an animal!

You can try other slides as well!

Slide 13 is a lichen which falls into the fungi kingdom.

Also, check out the Typical Plant Cell Slide 14!

​Fresh Water Fish Gills 100x
Fresh Water Fish Gills 400x

​Domain: Eukarya
Kingdom: Animalia

​Typical Plant Cell 40x
Typical Plant Cell 400x

​Domain: Eukarya
Kingdom: Plantae

​Lichen 100x Magnication and Lichen 400x Magnification

​Domain: Eukarya
Kingdom: Fungi

​What are some similarities and differences that you notice between these different organisms of different domains?

From left to right, we have eukaryotic organisms of the domains fungi, plantae, and animalia.

​Gimkit Quiz Review.