Chrysophytes – studybuddyshareline

studybuddyshareline

Chrysophytes

00:00 / 1:38

Chrysophytes

Members:
- Diatoms
- Golden algae (desmids)
Habitat:
- Freshwater and marine environments
Characteristics:
- Microscopic
- Planktonic (float passively in water currents)
- Mostly photosynthetic
Diatoms:
- Unique cell walls:
  - Two thin overlapping shells (like a soapbox)
  - Embedded with silica (indestructible)
- Form diatomaceous earth:
  - Accumulation of cell wall deposits over billions of years
  - Gritty texture used in polishing, filtration of oils and syrups
- Chief producers in the oceans (major contributors to primary production)

Test: Chrysophytes

Check your knowledge from the topic: Chrysophytes

1 / 5

Why are diatoms referred to as “chief producers” in the oceans?

Because they produce a lot of oxygen

Because they are a major source of food for marine animals.

Because they help to filter pollutants from the water

Both a and b

2 / 5

Which of the following is NOT a use of diatomaceous earth?

Polishing

Building material for houses

Filtration of oils and syrups

Food source for whales

3 / 5

What is “diatomaceous earth”?

A type of soil formed from the accumulation of diatom cell walls.

A layer of the Earth's crust rich in diamonds.

A type of algae found in freshwater.

A microscopic organism that floats in water currents.

4 / 5

What is a distinctive feature of diatoms’ cell walls?

They are made up of cellulose

They are soft and flexible

They form two overlapping shells embedded with silica.

They lack cell wall

5 / 5

Chrysophytes are typically found in which type of environment?

Only fresh water

Only marine (salty water)

Both fresh water and marine water

Desert environment

Your score is

The average score is 40%