Earthworm Biology and Ecology

The video explores the fascinating world of earthworms, highlighting their role as detritivores that transform dead organic matter into nutrient-rich compost. It delves into the biology and chemistry of earthworms, explaining how they digest plant and animal matter using specialized enzymes and gut microbes. The video also discusses the environmental benefits of earthworm castings, which enhance soil health and support ecosystems. Despite their positive impact, the video notes that invasive earthworms can disrupt ecosystems. The video concludes with a call to action for viewers to suggest future topics.

What type of diet do detritivores, like earthworms, primarily have?

• Carnivorous

• Herbivorous

• Detritivorous

• Omnivorous

Which famous scientist wrote his last book on earthworms?

• Isaac Newton

• Albert Einstein

• Charles Darwin

• Louis Pasteur

What is the function of the calcium carbonate secreted by earthworms?

• To help them move through soil

• To balance CO2 levels in their body

• To attract mates

• To strengthen their muscles

Which enzyme allows earthworms to digest cellulose?

• Lipase

• Amylase

• Pepsin

• Cellulase

What are drilodefensins used for in earthworms?

• To attract mates

• To neutralize plant toxins

• To digest cellulose

• To help in movement

What process do earthworm gut bacteria perform that involves nitrogen?

• Photosynthesis

• Denitrification

• Fermentation

• Respiration

What is the term used for earthworm excrement?

• Mulch

• Castings

• Compost

• Manure

How much dead organic matter can a herd of earthworms process per acre per year?

• 20 tons

• 10 tons

• 5 tons

• 30 tons

What is one negative impact of earthworms in some ecosystems?

• They increase soil acidity

• They disrupt native ecosystems

• They consume too much plant material

• They attract predators

What role do earthworm tunnels play in the ecosystem?

• They trap carbon dioxide

• They allow air and water to reach plant roots

• They provide shelter for insects

• They store water