Theca

Definition

Theca is a rigid, protective layer found in some algal cells, primarily composed of cellulose or polysaccharides. It provides structural support and protection from external environmental factors.

5 Must Know Facts For Your Next Test

1. The theca is commonly found in dinoflagellates and some other algae species.
2. It can be made up of multiple plates that fit together like armor.
3. Thecae contribute to the rigidity and shape of the algal cell.
4. They play a crucial role in protecting cells against predators and harsh conditions.
5. The presence and structure of the theca can be used to classify different types of algae.

Related terms

Dinoflagellate: A group of protists, many of which have two flagella and are encased in a cellulose-based thecal plate.

Cellulose:

An organic compound forming the primary structural component of plant cell walls, also found in algal thecae.

Polysaccharides:

Complex carbohydrates composed of long chains of monosaccharide units; they can form structural components like algal thecae.