LEARN CHRYSOPHYTES IN FIVE MINUTES I KINGDOM PROTISTA I NEET BIOLOGY I VC ACADEMY I VC SIR
Channel: VARA EDUTECH
Date: 2020-12-10

Chrysophytes 
 Chrysophytes include diatoms and golden algae(desmids)
 Found in freshwater as well as marine habitat or environment
 Generally microscopic in nature and floats passively in water currents
 These are mostly photosynthetic
 In diatoms, the cell wall forms 2 thin overlapping shells called epitheca and hypotheca
 Epitheca over hypotheca fits together as in as soap box
 The walls are embedded with silica and thus the walls indestructible
 Diatoms have left behind large amounts of cell wall deposits in their habitat 
 This accumulation over billions of years is referred as diatomaceous earth or kieselguhr
 Being gritty, this soil is used in polishing, filtration of oils and syrups
 
Diatoms are the chief producers in the ocean
 Diatoms are divided into two types based on their structural symmetry
 Centrale diatoms and pennale diatoms
 Reproduces asexually by binary fission and sexually by formation of gametes
 Auxospores are formed as a result of sexual reproduction and these are rejuvenatory spores