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Ch 1: Introduction to Biology Topics

About This Chapter

Learn all about science with engaging video lessons that cover everything from biology to environmental science. Each video has simple animations and concrete examples that bring science to life and make it easy to understand.

Intro to Science Chapter Summary

Get an overview of special topics in science with this collection of video lessons. These lessons span all areas of science, including:

  • Biology (includes ecology, anatomy & physiology, microbiology, pathophysiology and more)
  • Physics
  • Chemistry (includes organic and inorganic chemistry)
  • Earth Science (includes geology and astronomy)
  • Environmental Science

All lessons are taught by subject matter experts with unique knowledge in the fields and are meant to supplement our existing full-length science courses. Check out our complete list of life and physical science courses below.

How to Use this Chapter

These lessons are a great study aid that can help you complete your homework or study for exams, and they can be viewed in any order. The lessons in this chapter are designed to let you dig deeper into science topics, allowing you to gain a more in-depth understanding of a specific scientific topic. These brief, animated videos bring scientific topics to life in a way that textbooks can't, allowing you to learn and absorb the information more efficiently.

You can also use the lessons as a supplement to our other courses. This chapter pairs with our other science courses, including:

Visit these courses if you want to see many more lessons on the same topic or are looking to earn college credit.

20 Lessons in Chapter 1: Introduction to Biology Topics
Nonvascular Plants: Examples, Definition & Characteristics

1. Nonvascular Plants: Examples, Definition & Characteristics

This lesson will explore the world of a small and simple type of plant known as a nonvascular plant. We'll also discuss types of nonvascular plants and their importance in the environment.

Vascular Plants: Examples, Types & Characteristics

2. Vascular Plants: Examples, Types & Characteristics

This lesson will explore the characteristics of a large group of plants known as vascular plants. The lesson will also focus on the different types of vascular plants and unique examples.

Angiosperms: Characteristics, Definition & Examples

3. Angiosperms: Characteristics, Definition & Examples

Flowering plants are also known as angiosperms. In this lesson, we will explore this vast group of plants to learn what sets them apart from other types of plants and how they survive.

Freshwater Biomes: Climate, Locations, Plants & Animals

4. Freshwater Biomes: Climate, Locations, Plants & Animals

Freshwater biomes are very important to life on Earth. They are home to many different species and provide a lot of resources. In this lesson, we will go over what a freshwater biome is, where they are located, and the different plants and animals that inhabit them.

Open Ocean Biome: Plants, Animals, Climate & Definition

5. Open Ocean Biome: Plants, Animals, Climate & Definition

Seventy-one percent of the surface of our planet is covered by the oceans. It should be no surprise that the open ocean biome is the largest biome on Earth. In this lesson, we will investigate the properties and inhabitants of the open ocean biome.

Ovum: Definition, Function & Structure

6. Ovum: Definition, Function & Structure

Sexually reproducing organisms require an egg and a sperm to create new life. This is the story of the egg (or ovum), the female sex cell and one of the most crucial elements of biological diversity.

What is a Terrestrial Ecosystem? - Definition, Examples & Types

7. What is a Terrestrial Ecosystem? - Definition, Examples & Types

There are a variety of different ecosystems all over the world. In this lesson, we will examine terrestrial ecosystems. This will allow us to gain an understanding of the living and non-living factors that makeup these dynamic ecosystems.

Temporal Isolation: Example & Definition

8. Temporal Isolation: Example & Definition

What prevents species that are closely related from mating with each other? Temporal isolation is an evolutionary mechanism that keeps individuals of different species from interbreeding, even if they live in the same environment.

Mechanical Isolation: Definition & Example

9. Mechanical Isolation: Definition & Example

What prevents species that are closely related from mating with each other? Sometimes it's just a matter of having the right equipment - mechanical isolation is one evolutionary mechanism that prevents different species from interbreeding.

Bacterial Colony: Morphology, Characteristics & Definition

10. Bacterial Colony: Morphology, Characteristics & Definition

Microscopic bacteria grow together in visible colonies. Learn the characteristics and vocabulary used to describe the appearance of those colonies and test your knowledge with practice examples in this lesson.

Binomial Nomenclature: Definition, Classification & System

11. Binomial Nomenclature: Definition, Classification & System

Life on Earth is incredibly diverse, with over one million species. But have you ever wondered how all these organisms are named? In this lesson, you'll learn about the scientific naming system called binomial nomenclature.

Alveoli: Function, Definition & Sacs

12. Alveoli: Function, Definition & Sacs

Alveoli are tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and bloodstream. Learn more about how they function and quiz your knowledge at the end.

Stomata of Plants: Function, Definition & Structure

13. Stomata of Plants: Function, Definition & Structure

Did you know that plants 'breathe' through their leaves? Tiny openings called stomata allow plants to exchange gases necessary for cellular processes, such as photosynthesis.

Villi: Function, Definition & Structure

14. Villi: Function, Definition & Structure

Do you think your small intestine is just a simple tube, transporting your dinner and providing you with nutrients? Read on to learn just how interesting this 'simple tube' can be.

Commensalism: Relationship Examples, Definition & Types

15. Commensalism: Relationship Examples, Definition & Types

Living organisms found in nature react and live with one another in a variety of ways. One of these interesting types of relationships between two organisms is called commensalism. In this lesson, we will explore commensalism and see how it works.

What Are Natural Resources? - Definition & Types

16. What Are Natural Resources? - Definition & Types

Natural resources are materials provided by the Earth that humans can use to make more complex (human-made) products. In this lesson, you will learn some examples of natural resources and how to classify them.

Natural Resources List & Flashcards

Natural Resources List & Flashcards

Did you know that natural resources can be classified based on how they were created and if we can replenish them? This set of flashcards will help you explore types and examples of natural resources.

Abiotic Factors of an Ecosystem: Definition & Examples

18. Abiotic Factors of an Ecosystem: Definition & Examples

When it comes to ecosystems, a mountain, a river, and a cloud have more in common than you might think. Abiotic factors have specific and important roles in nature because they help shape and define ecosystems.

Abiotic Factors of an Ecosystem Flashcards

Abiotic Factors of an Ecosystem Flashcards

This flashcard set will help you to understand the difference between abiotic and biotic factors, as well as memorize specific examples of the two types found in aquatic and terrestrial ecosystems.

Phosphorus Cycle: Steps, Definition & Diagram

20. Phosphorus Cycle: Steps, Definition & Diagram

Phosphorus is an essential element to all living organisms. It is part of our DNA and RNA, and it forms the molecule ATP, which gives all living things energy. This lesson explains its importance and will walk you through the steps of the phosphorus cycle.

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