Question 1

What are algae and diatoms primarily classified as?

Accepted Answer

Protists

Answer

Plants

Answer

Bacteria

Answer

Fungi

Question 2

Which of the following is a characteristic feature of diatoms?

Accepted Answer

Silica cell walls

Answer

Spores

Answer

Chlorophyll

Answer

Flagella

Question 3

In which environments are diatoms commonly found?

Accepted Answer

Freshwater and marine habitats

Answer

Volcanic lava fields

Answer

Desert sand dunes

Answer

Deep-sea hydrothermal vents

Question 4

What is the primary pigment responsible for the photosynthetic activity in algae and diatoms?

Accepted Answer

Chlorophyll a

Answer

Chlorophyll b

Answer

Phycobilins

Answer

Carotenoids

Question 5

Algae play a crucial role in the ecosystem by:

Accepted Answer

All of the above

Answer

Serving as primary consumers in food chains

Answer

Producing oxygen through photosynthesis

Answer

Decomposing dead organic matter

Question 6

Which of the following is NOT a type of algae?

Accepted Answer

Protozoa

Answer

Red algae

Answer

Green algae

Answer

Brown algae

Question 7

Diatoms are commonly used in environmental studies because:

Accepted Answer

They are indicator species for water quality

Answer

They produce toxins harmful to other organisms

Answer

They are resistant to pollution

Answer

They are invasive species in many ecosystems

Question 8

What is the main storage product of energy in algae and diatoms?

Accepted Answer

Lipids

Answer

Cellulose

Answer

Glycogen

Answer

Starch

Question 9

Which of the following is a unique feature of diatom cell walls?

Accepted Answer

Silica

Answer

Calcium carbonate

Answer

Cellulose

Answer

Chitin

Question 10

In which of the following habitats would you most likely find macroscopic algae?

Accepted Answer

Coral reefs

Answer

Desert dunes

Answer

Deep-sea hydrothermal vents

Answer

Mountain glaciers

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