Ecological Pyramids and Energy Flow

The video explores the relationships between organisms in ecosystems, focusing on ecological pyramids. It explains trophic levels and introduces three types of pyramids: number, biomass, and energy. Each pyramid type is discussed in terms of its structure and significance, highlighting how energy and biomass decrease as one moves up the trophic levels. The video concludes by noting that while number and biomass pyramids can be inverted, energy pyramids are always upright due to energy loss at each level.

What is the primary relationship between organisms in an ecosystem?

• Sharing of resources

• Competition for space

• Dependence for food and energy

• Mutual cooperation

Which organisms form the first trophic level in an ecosystem?

• Tertiary consumers

• Producers

• Primary consumers

• Secondary consumers

What type of ecological pyramid represents the number of individuals at each trophic level?

• Inverted pyramid

• Energy pyramid

• Biomass pyramid

• Number pyramid

In a number pyramid, which trophic level typically has the most individuals?

• Producers

• Tertiary consumers

• Primary consumers

• Secondary consumers

What does biomass represent in an ecosystem?

• The number of species

• The mass of all organisms

• The diversity of organisms

• The energy flow

Which unit is typically used to measure biomass?

• Meters per second

• Joules

• Kilograms per square meter

• Liters

What is the main source of energy for plants in an ecosystem?

• Air

• Water

• Soil

• Sun

How much energy is typically transferred from one trophic level to the next?

• 50%

• 25%

• 5%

• 10%

Why can energy pyramids never be inverted?

• Energy increases at higher trophic levels

• Energy is always lost as heat

• Energy is equally distributed

• Energy is not transferred

Which type of ecological pyramid can only be upright?

• Number pyramid

• Biomass pyramid

• Energy pyramid

• Inverted pyramid