Protists: The Diverse and Complex Unicellular and Multicellular Organisms | Slides Cell Biology

Protists Name: ___________________

Directions: Read, Highlight, and Answer questions.

Cells:

The Protists Kingdom consists of unicellular (life forms with only one cell) and some

multicellular life forms that have a nucleus. If you think back to everything we discussed

in class that would make Protists eukaryotic cells. The main difference between protists

and prokaryotes (archeabacteria and eubacteria) is that Protists are more complex, having

a nucleus.

Protists are all around us. There are more than 200,000 species in the kingdom. Protists

can be found in most every environment on Earth. They have been discovered in the

deepest parts of the oceans and on the highest peaks of the mountains. Ponds, streams,

rivers, swamps, most soil, and even the very acidic water caused by industrial pollution

contain some species of Protists. As long as there is a consistent supply of water Protists

can flourish.

Protists come in many different shapes, sizes, and colors. Some Protists have traits like

animals. Others have traits like plants, such as Algae. Still others have traits like fungi.

Slime molds, water molds, and downy mildews are examples of fungi-like Protists. In early

classifications, some Protists were grouped in the animal kingdom, and the algae and slime

molds were placed among several divisions of plants. Today scientists classify these tiny

organisms in their own kingdom known as Protista.

1. How are Protists different from Archeabacteria and Eubacteria?

_________________________________________________________

Grow and Develop:

Even though scientists have gone to great lengths to note the differences between

Protists and the animal and plant kingdoms, they still use these kingdoms to help describe

the different types of Protists. Protists are animal like, plant like, or fungi like.

Protists are so small that they do not need any special

organelles to take in gas or get rid of waste. They rely on

simple diffusion, the movement of materials from an area

of high concentration to an area of low concentration.

Diffusion only works if you’re really small, so most

Protists are limited to being small single cells. Plus if they

are too large their cilia or flagella will not have enough

power to move them out of the way of danger.

2. Why are Protists so tiny?

______________________________________________________________

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Protists Name: ___________________

Directions: Read, Highlight, and Answer questions.

Cells:

The Protists Kingdom consists of unicellular (life forms with only one cell) and some multicellular life forms that have a nucleus. If you think back to everything we discussed in class that would make Protists eukaryotic cells. The main difference between protists and prokaryotes (archeabacteria and eubacteria) is that Protists are more complex, having a nucleus.

Protists are all around us. There are more than 200,000 species in the kingdom. Protists can be found in most every environment on Earth. They have been discovered in the deepest parts of the oceans and on the highest peaks of the mountains. Ponds, streams, rivers, swamps, most soil, and even the very acidic water caused by industrial pollution contain some species of Protists. As long as there is a consistent supply of water Protists can flourish.

Protists come in many different shapes, sizes, and colors. Some Protists have traits like animals. Others have traits like plants, such as Algae. Still others have traits like fungi. Slime molds, water molds, and downy mildews are examples of fungi-like Protists. In early classifications, some Protists were grouped in the animal kingdom, and the algae and slime molds were placed among several divisions of plants. Today scientists classify these tiny organisms in their own kingdom known as Protista.

How are Protists different from Archeabacteria and Eubacteria?

Grow and Develop:

Even though scientists have gone to great lengths to note the differences between Protists and the animal and plant kingdoms, they still use these kingdoms to help describe the different types of Protists. Protists are animal like, plant like, or fungi like.

Protists are so small that they do not need any special organelles to take in gas or get rid of waste. They rely on simple diffusion, the movement of materials from an area of high concentration to an area of low concentration. Diffusion only works if you’re really small, so most Protists are limited to being small single cells. Plus if they are too large their cilia or flagella will not have enough power to move them out of the way of danger.

2. Why are Protists so tiny?

______________________________________________________________

Obtain and Use Energy

Just like bacteria, Protists can gain energy in a variety of ways. Some Protists are Heterotrophs, which means they get energy by eating or absorbing food. Examples of hertertrophs are Amoebas and Paramecium (animal like Protists) that move around to get their food. Other Protists are Photoautotrophs that make their own food from the sunlight. Algea is a great example of a photautotroph. Unlike the bacteria kingdoms scientists do not know of any Protists that are Chemoautotrophs.

The photoautotrophs are very similar to plants. They have chloroplasts that are responsible for absorbing the sunlight and turning it into useable energy. As for the heterotrophs, these Protists eat by engulfing their food in their cell membrane. The cell membrane surrounds the food and then pinches off a section of membrane to form a hollow space inside the cell.

This hollow space that is surrounded by the cell membrane is called a vacuole. Just like in plant and animal cells the vacuole in the Protists also stores water and waste. Paramecium and many other Protists also have a vacuole similar to a lysosome, which gets rid of waste products and pushes them outside the cell.

As we discussed in class most Protists move by using flagella (tails) or cilia (tiny hairs). Some Protists just blob from one area to the next. (Poor amoeba has no feet to move). They only have false feet (Pseudopods) to wrap around their food or to move from one area to the next.

How do Protists that are heterotrohs get their energy?
What are three ways that Protists use to move?

Reproduction

Protists reproduce asexually through binary fission while a few species are capable of sexual reproduction (2 parents). Animal like amoebas and plant like Euglena reproduce asexually meaning the only have binary fission. In this case, when the parent cell splits in half, there is an exact chromosome copy in each daughter cell.

Protists: The Diverse and Complex Unicellular and Multicellular Organisms, Slides of Cell Biology

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Partial preview of the text

Download Protists: The Diverse and Complex Unicellular and Multicellular Organisms and more Slides Cell Biology in PDF only on Docsity!

Protists Name: ___________________

Directions: Read, Highlight, and Answer questions.

Cells:

Grow and Develop:

2. Why are Protists so tiny?

______________________________________________________________

______________________________________________________________

Obtain and Use Energy

Reproduction