Diatomaceous earth is a result of accumulation of cell wall deposits of diatoms over

(1) Billions of years

(2) Millions of years

(3) Thousands of years

(4) Hundreds of years

(1) Chief producers of Earth

(2) Form diatomaceous earth which has gritty soil

(3) Gritty soil is used in filtration

(4) Gritty soil is used in polishing

(1) Red dinoflagellates

(2) Geladium

(3) Red Chrysophytes

(4) Red algae

(1) Marine and photosynthetic

(2) Variety in colors

(3) Cell wall with silica

(4) Two flagella

(1) Black

(2) White

(3) More than one option is correct

(4) Pink

(1) Loose cellulose plates in cell wall

(2) The outer surface has more loosening of cell wall than inner

(3) Rapid multiplication

(4) Not harmful for others

(1) Harmful for marine organisms

(2) Gonyaulax

(3) Aquatic habitat

(4) Color is due to pigment in the cell of Dinoflagellates

(1) All, 2, both

(2) Many, 3, transverse flagella 

(3) Most, 2, transverse flagella 

(4) All, 3, longitudinal flagella 

(1) Euglenoids

(2) Dinoflagellates

(3) Diatoms

(4) Eubacteria

(1) Mostly marine

(2) Have pellicle

(3) Lack cell wall

(4) Flexible body