About This Chapter
Biodiversity Over Time - Chapter Summary
Various forms of life on Earth have changed significantly over time. This chapter takes a close look at this change in biodiversity by examining the origin of life on Earth, the evolution of vascular plants, the concept of extinction and much more. Review fun lessons to study this subject and enhance your ability to:
- Describe the origin and history of life on Earth
- Provide details about the early evolution of mammals and evolution of vascular plants
- Explain how paleontology, biogeography and embryology provide evidence for evolution
- Define extinction and mass extinction
- List types and characteristics of fossils and define a fossil record
- Share the definitions of absolute age and relative age
- Discuss fossil evidence for biological diversity, speciation and mass extinction
- Differentiate between divergent and convergent evolution
This chapter enables you to study changes in biodiversity over time without setting foot in a traditional classroom. Review fun lessons online and easily send your lesson topic questions to our subject-matter experts via your computer or mobile device. Before, during, or after reviewing the lessons, gauge your comprehension of their content using their self-assessment quizzes. Find out how much you understand about the entire chapter by taking the practice chapter exam.
1. The Origin of Life on Earth: Theories and Explanations
Ever wonder how living things came from non-living things? We will explore what conditions on early Earth may have created life from non-living items.
2. The History of Life on Earth: Timeline and Characteristics of Major Eras
The Earth is over 4 billion years old. Ever wonder what happened during certain time periods in that large amount of time? We will look at the major eons and eras of Earth's history along with important characteristics of each.
3. The Origin & Early Evolution of Mammals
In this lesson, we'll explore the ancestry and evolution of mammals and discover how reptiles hundreds of millions of years ago ended up evolving into one of the most successful orders of animals in history. Then, you can test your understanding with a brief quiz.
4. The Evolution of Vascular Plants
This lesson will cover the basics of the earliest evolution of vascular plants, as well as why and how they came to be. Terms such as stomata, rhizoids, xylem, and phloem are defined.
5. Evidence for Evolution: Paleontology, Biogeography, Embryology, Comparative Anatomy & Molecular Biology
There is much support for the theory of evolution. This evidence comes from a variety of scientific fields and provides information that helps us trace changes in species over time. In this lesson, we'll look at this evidence and explore how it supports the theory of evolution.
6. What Is Extinction? - Defining Background and Mass Extinction
In this lesson you'll discover what the term 'extinction' means as well as learn the two different types of extinction: mass extinction and background extinction. You will also discover how humans contribute to extinction events.
7. Fossil: Definition, Types, Characteristics & Examples
Fossils provide scientists with many clues about Earth's history, offering evidence of dinosaurs and strange plants that existed in the past. This lesson will define a fossil, look at different types and characteristics of fossils, and then describe how fossils are formed.
8. Fossil Record: Definition & Examples
This lesson teaches you about the fossil record. It explains how scientists learn about Earth's distant past and highlights what fossils can tell scientists about ourselves and other organisms.
9. Absolute Age: Definition & Dating
Imagine braving the desert heat for days or even weeks as you dig for dinosaur bones. You find something extraordinary and want to know as much about it as you can. In this lesson, you'll learn how scientists determine the absolute age of materials.
10. What is Relative Age? - Definition & Effect
How do geologists determine the age of different rock layers or fossils without the aid of modern equipment? Learn how geologists use rock layers to determine relative ages.
11. Fossil Evidence for Biological Diversity, Speciation, & Mass Extinction
One of the best sources of evidence we have for evolution is the fossil record. Fossils provide a wealth of information on how species change over time and for exciting events like mass extinctions and new species formation.
12. Divergent & Convergent Evolution: Definitions & Examples
Two types of macroevolution are essential to the understanding of evolutionary theory. Explore this lesson and learn more about convergent evolution and divergent evolution.
Earning College Credit
Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.
To learn more, visit our Earning Credit Page
Transferring credit to the school of your choice
Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.
Other chapters within the VCE Biology: Exam Prep & Study Guide course
- Developing a Scientific Investigation
- Ethical Considerations in Scientific Investigations
- Collecting Scientific Data
- Processing Experimental Results
- Communicating Scientific Ideas
- Cell Size, Structure & Function
- The Cell Membrane
- Stages of the Cell Cycle
- Cell Growth & Differentiation
- Energy Transformations in Living Things
- Functioning Systems of Living Things
- Adaptation & Regulation in Living Things
- Understanding Biodiversity
- Ecosystem Relationships & Populations
- Asexual & Sexual Reproduction
- Genomes, Genes & Alleles
- Chromosomes & Chromosome Disorders
- Genotypes & Phenotypes
- Pedigrees & Genetic Inheritence
- Cellular Membranes & Structures
- Nucleic Acids & Proteins
- Gene Structure & Regulation
- Understanding Enzymes
- Photosynthesis Overview
- Cellular Respiration Overview
- Cellular Signals
- Antigens & Immune Response
- Immunity & the Immune System
- Genetics & Populations
- Relatedness Between Species
- Human Evolution
- DNA Manipulation
- Biological Knowledge & Society
- VCE Biology Flashcards