What are Gemmules?
Definition of Gemmule: A gemmule is an asexually formed clump of cells that can differentiate into an adult freshwater sponge. These are tiny, bud-like clusters of cells that sponges generate to survive harsh environmental conditions.
“Gemmule” is a term coined by Charles Darwin in his theory of pangenesis, proposed in the late 19th century. According to this theory, gemmules were hypothetical particles that were believed to be produced by all cells. They were responsible for transmitting hereditary information from one generation to the next.
In Darwin’s concept of pangenesis, gemmules were thought to circulate throughout an organism’s body, accumulating in the reproductive organs and ultimately being passed on to offspring during reproduction. These gemmules were believed to carry information from various parts of the body and were responsible for determining the traits of the offspring.
Gemmule – Formation, Structure and Role in Sponge Reproduction
Gemmules are the asexual reproductive structures found in some freshwater and marine sponge species. The gemmules in sponges are produced in adverse weather circumstances, including drought or low temperatures. The gemmules play a role in giving sponges the ability to tolerate harsh environmental conditions. In this article, we will study the gemmules in sponges, their structure, characteristics, and their advantages.
Table of Content
- What are Gemmules?
- Structure of Gemmules
- Gemmule Diagram
- Parts of Gemmule
- Gemmules Classification
- What are the Characteristics of Gemmules?
- What is the Process of Gemmule Formation?
- Gemmule Formation Examples
- Role of Gemmule in Sponge Reproduction
- Advantages of Gemmule Formation