Microscopic Organisms and Soil Ecology

The video tutorial explores various soil organisms, both microscopic and visible. It highlights the abundance and classification of bacteria, viruses, algae, fungi, protozoa, and nematodes in soil. The role of bacteria in enriching soil and supporting plant life is discussed, along with the potential harm of certain bacteria. Algae's ability to perform photosynthesis and the existence of diatoms are explained. The video also covers the role of ants and nematodes in soil health, noting their benefits and potential threats to plants.

Which of the following is NOT a microscopic soil organism?

• Earthworms

• Algae

• Viruses

• Bacteria

What type of microscope is typically required to view viruses?

• Compound microscope

• High-powered optical microscope

• Electron microscope

• Simple magnifying glass

In what type of soil do bacteria thrive the most?

• Sandy soil

• Nutrient-rich organic soil

• Dry soil

• Clay soil

What is the main role of bacteria in garden soil?

• To decompose organic matter

• To perform photosynthesis

• To act as a pesticide

• To provide structural support

What is the primary function of chlorophyll in algae?

• To protect from predators

• To absorb water

• To perform photosynthesis

• To store nutrients

Diatoms are classified under which category?

• Fungi

• Protozoa

• Phytoplankton

• Nematodes

How do ants contribute to soil enrichment?

• By producing chlorophyll

• By decomposing organic matter

• By consuming nematodes

• By releasing oxygen

What is a potential use of nematodes in agriculture?

• As a fertilizer

• As an insecticide

• As a soil conditioner

• As a water retainer

Which of the following organisms can be harmful to plants if present in large colonies?

• Bacteria

• Diatoms

• Ants

• Algae

Which of the following is a characteristic of parasitic nematodes?

• They enrich the soil

• They are beneficial to plant life

• They perform photosynthesis

• They can be hazardous to humans