Pleomorphic

Definition

Pleomorphic describes organisms, particularly bacteria, that can alter their shape or size in response to environmental conditions. This characteristic is commonly observed in some Gram-positive bacteria.

5 Must Know Facts For Your Next Test

1. Pleomorphic bacteria can exhibit various shapes during different stages of their life cycle.
2. Corynebacterium and Mycoplasma are examples of pleomorphic Gram-positive bacteria.
3. The ability to change shape allows pleomorphic bacteria to adapt to diverse environmental conditions.
4. Pleomorphism can complicate the identification and classification of bacterial species.
5. Environmental factors such as nutrient availability and temperature often influence pleomorphism.

Review Questions

• What does it mean for a bacterium to be pleomorphic?
• Name two examples of Gram-positive pleomorphic bacteria.
• How does pleomorphism benefit bacteria in adapting to their environment?

Related terms

Monomorphic: Describes organisms that maintain a single shape throughout their life cycle.

Corynebacterium:

A genus of Gram-positive, often pleomorphic bacteria known for causing diphtheria.

Mycoplasma:

A genus of small, wall-less, pleomorphic bacteria known for causing respiratory infections.