Chrysophytes

Q.

Which of the following organism is known as chief producers in the ocean?

1. Cyanobacteria

2. Diatoms

3. Dinoflagellates

4. Euglenids

Q.

What are examples of diatoms?

Q.

What is the definition of diatoms?

Q.

Diatomaceous earth is used in

1. Purification of uranium

2. Filtration and purification of liquids

3. Insulation and sound proofing

4. Both (b) and (c)

Q. Which group of Protists are responsible for the formation of diatomaceous earth?

1. Chrysophytes
2. Dinoflagellates
3. Euglenoids
4. Slime Moulds

Q.

Are diatoms still used in toothpaste?

Q. In which group of organisms the cells walls form two thin overlapping shells which fit together?

1. Slime moulds
2. Chrysophytes
3. Euglenoids
4. Dinoflagellates

Q. Which of the following is not made up of proteins?

1. capsomeres
2. pellicle
3. prions
4. diatomaceous earth

Q. Which of the following is not a characteristic feature of chrysophytes?

1. Microscopic planktons
2. Form diatomaceous earth
3. Chief producers of the ocean
4. Pellicle- protein layer covering the cell membrane