Fragmentation

Definition

Fragmentation is a form of asexual reproduction where an organism splits into fragments, each capable of developing into a new individual. This method is common in some invertebrates and involves regeneration of missing parts.

5 Must Know Facts For Your Next Test

1. Fragmentation allows organisms to reproduce without the need for a mate, making it advantageous in stable environments.
2. Echinoderms, such as starfish, are well-known examples of animals that utilize fragmentation for reproduction.
3. Each fragment must contain part of the central disc or a similar vital structure to successfully regenerate into a complete organism.
4. Fragmentation can also serve as a survival strategy, allowing an organism to recover from injury by regenerating lost body parts.
5. This method of reproduction contributes to genetic consistency within populations since offspring are genetically identical to the parent.

Review Questions

• Which invertebrate group commonly uses fragmentation as a reproductive strategy?
• What essential condition must be met for each fragment to develop into a new organism?
• How does fragmentation contribute to genetic diversity or consistency within populations?

Related terms

Regeneration:

The process by which organisms regrow lost or damaged parts.

Asexual Reproduction: A mode of reproduction involving only one parent that results in offspring genetically identical to the parent.

Budding:

A form of asexual reproduction where a new organism develops from an outgrowth or bud on the parent.