Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

1. Overview of Cell Biology

Evolution of the Cell

Cell Biology

1. Overview of Cell Biology

Evolution of the Cell

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Multiple Choice

Which of the following is not an evolutionary mechanism responsible for organismal diversity?

Sexual Reproduction

Mutations

Endosymbiont theory

Horizontal Gene Transfer

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Verified step by step guidance

Understand the concept of evolutionary mechanisms: These are processes that contribute to the genetic variation and diversity of organisms over time.

Review the role of sexual reproduction: It increases genetic diversity through the combination of genetic material from two parents, leading to offspring with unique genetic makeups.

Examine mutations: Mutations are changes in the DNA sequence that can introduce new genetic variations, some of which may be beneficial and contribute to evolutionary change.

Consider horizontal gene transfer: This is the movement of genetic material between organisms other than through vertical transmission (from parent to offspring), and it can introduce new genes and traits into a population.

Clarify the endosymbiont theory: This theory explains the origin of certain organelles in eukaryotic cells, such as mitochondria and chloroplasts, as a result of symbiotic relationships, rather than a direct mechanism for generating organismal diversity.