Biodiversity and Ecosystem Functions

The video discusses the importance of biodiversity, highlighting the current biodiversity crisis and its causes, such as habitat loss, pollution, and alien species. It explains the direct and indirect values of biodiversity, including medicinal, agricultural, and ecosystem services. The video emphasizes the need to preserve biodiversity for its ecological and economic benefits.

What is the primary reason for the current biodiversity crisis?

• Predator-prey imbalance

• Human activities

• Natural disasters

• Climate change

Which of the following is a major cause of habitat loss?

• Pollution

• Invasive species

• Deforestation

• Overfishing

How do alien species affect native ecosystems?

• They crowd out native species

• They improve soil quality

• They provide new food sources

• They increase biodiversity

What is an example of a direct value of biodiversity?

• Climate regulation

• Water purification

• Medicinal resources

• Soil erosion prevention

Which plant from Madagascar has contributed to cancer treatment?

• Rosy periwinkle

• Madagascar palm

• Aloe vera

• Baobab

Why is biological pest control preferred over chemical pesticides?

• It is cheaper

• It is more effective

• It is environmentally friendly

• It requires less labor

What role do decomposers play in ecosystems?

• They control pests

• They pollinate plants

• They break down waste

• They produce oxygen

How do intact ecosystems help prevent soil erosion?

• By stabilizing the climate

• By reducing animal populations

• By increasing rainfall

• By maintaining vegetation cover

What is a significant indirect value of biodiversity related to tourism?

• Improved air quality

• Ecotourism opportunities

• Enhanced medicinal resources

• Increased agricultural yield

How does ecotourism benefit local economies?

• By increasing biodiversity

• By conserving water

• By providing jobs and income

• By reducing pollution