About This Chapter
Bacteria & Protists
This chapter covers topics on some of the smallest representatives of the living world -- bacteria & protists. You'll learn to identify the majors types of each and explain their similarities and differences. Among other topics, we'll cover the following:
- Bacteria and Protist cell structures, morphology, and functions
- Different locations where Bacteria and Protist live, including freshwater and anaerobic environments
- Examples of Protist life cycle and characteristics like reproduction, feeding, and locomotion
1. What is Bacteria? - Definition & Types
Germs...bugs...prokaryotes...monerans. Whatever you call them, bacteria outnumber every other kind of life on this planet. In this lesson, we'll take a look at these tiny creatures to determine exactly what they are, as well as the methods we use to try and classify them.
2. Archaea & Bacteria: Similarities & Differences
Archaea and bacteria are both microorganisms. They are similar in size and shape, but differ greatly upon closer inspection of their genes and proteins. Find out more in this lesson.
3. Bacterial Cell Morphology and Classification: Definition, Shapes & Arrangements
Do all bacteria look the same? Definitely not! These tiny, singled-celled organisms come in a variety of morphologies, from cocci to spirals to tetrads. Many bacterial names even have clues to their morphology!
4. Types of Bacteria Found in Anaerobic Environments
This lesson will focus in on the world of anaerobes. We'll discuss the different types of anaerobes that abound on this planet, including obligate, facultative and aerotolerant anaerobes.
5. Bacterial Cell Walls: Structure, Function & Types
The bacterial cell wall has to be strong to prevent cell lysis but also porous to allow transport across the cell membrane. In this lesson, we will examine the structure of the bacterial cell wall and how it accomplishes both of these crucial tasks.
6. Protist Cell Structure
Protists are an extremely diverse group of eukaryotic organisms. This lesson provides an overview of various protist cells, including their structures, organelles, shapes, and sizes.
7. Protist Life Cycle
In this lesson, you'll learn about protists. In particular, you'll learn about their life cycles, including reproduction and stages of growth and development.
8. Heterotrophic Protists: Feeding Mechanism, Characteristics & Reproduction
Heterotrophic protists are not capable of making their own food. In order to live, they have to obtain carbon containing nutrients from the environment or by ingesting other living organisms. This lesson will describe a few of the mechanisms they use for feeding.
9. Colonial Protists: Definition & Examples
Protists are a unique group of organisms because they don't quite fit the mold. And while some protists prefer to live as individuals, other prefers to work together for the greatest benefit. These colonial protists are the topic of this lesson.
10. Common Freshwater Protists
In bodies of fresh water, we find unicellular organisms known as protists. Some are easy to see, such as clumps of algae. However, many are microscopic. Learn more about common freshwater protists in this lesson.
11. Examples of Unicellular Protists
Protists are a diverse group of eukaryotic organisms that usually live in aquatic environments. This lesson describes unicellular protists - entire organisms that are just a single cell!
12. 3 Methods of Protist Locomotion
In this lesson, we will explore protists and the mechanisms these organisms use to move around--their methods of locomotion. At the end, take a brief quiz to test your knowledge.
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Other chapters within the Biology 101: Intro to Biology course
- Basic Terms & Skills in Biological Science
- Inorganic Chemistry Review for Biology
- Introduction to Organic Molecules & Heterotrophs
- The Nucleotide Structure of DNA & RNA
- Enzyme Function, Interactions & Regulation
- Cell Membrane Model, Components & Transport
- Cell Structure, Organelles & Organelle Functions
- Cellular Metabolism & Respiration
- Processes & Steps of DNA Replication
- Transcription, Translation & Protein Synthesis
- Types & Effects of Genetic Mutations
- Cell Growth & The Process of Cell Division
- Botany: Life Processes in Plants
- The Musculoskeletal, Circulatory, Respiratory, Digestive & Excretory Systems
- The Nervous System & Endocrine System
- Reproduction, Development & Survival in Animals
- Mendelian Genetics & Mechanisms of Heredity
- Ecology Principles & Community Ecology
- Evolutionary Principles & Natural Selection
- Earth's Timeline & Geological Evolution
- Taxonomic Classification & Phylogeny
- Genetic Engineering & DNA Sequencing
- Studying for Biology 101