Question

True or False: Diatoms are fungi incorporate silicon dioxide into their cell walls
please explain the answer

Answer 1

Answer -

This statement is false . Diatoms are not fungi.

• Diatoms are a major group of algae and are most common type of phytoplanktons.
• Diatoms belongs to class Bacillariophyceae.
• They belong to the kingdom - Protista. Commonly called as plant like protists.
• ​​​​​Diatoms are unicellular organisms although they can form colonies.
• There are atleast 100,000 species of diatoms have been discovered.
• Cell wall of diatoms is made up of cellulose and siliceous frustule (Silica deposited in cell wall).
• The frustule is made up of two valves epitheca and hypotheca.
• They do not decay easily.
• After their death cell wall remains, they pile up at the bottom of the water bodies and form diatomaceous earth or diatomite.
• Reproduction through asexual and sexual mode.
• they are two types based on body symmetry. 1 ) Pennate - Bilaterally symmetry example Navicular ,2) ​​​​​​Centric - Radial symmetry example - Melosira
• Pigments present - Chlorophyll a , Chlorophyll c and fucoxanthin .
• Reseved food material - lecosin and Crysolaminarian starch.

Asexual reproduction - newly synthesized theca is always Hypotheca. New theca is synthesized always inside thatswhy Hypotheca is always new theca .

Epitheca اما Hypotheca Ist generation genvratit -on

During asexuall reproduction size of the theca is gradually decrease generation after generation and if theca size is excessively decrease then diatoms favour sexuall reproduction.