Ecology and Ecosystem Concepts

The video lecture introduces the principles of ecology, focusing on the interactions between organisms and their environment. It covers biotic and abiotic factors, ecological levels, and biomes. The lecture explains the classification of biomes based on climate, plants, and animals. It also discusses ecological succession, symbiotic relationships, and the roles of autotrophs and heterotrophs in ecosystems.

What is the study of interactions between organisms and their environment called?

• Geology

• Biology

• Ecology

• Zoology

Which of the following is a biotic factor in an ecosystem?

• Bacteria

• Sunlight

• Temperature

• Rocks

What is the largest level of ecological organization?

• Community

• Ecosystem

• Biome

• Biosphere

Which of the following is NOT a factor used to classify a biome?

• Precipitation

• Plants

• Soil type

• Temperature

What percentage of Earth's water is freshwater?

• 98%

• 10%

• 2%

• 50%

Which biome is characterized by 150 cm of rain and 10°C annual temperature?

• Temperate Deciduous Forest

• Desert

• Coniferous Forest

• Tropical Rainforest

What is the role of pioneer species in primary succession?

• They are the final stage of succession.

• They break down rock to form soil.

• They require a lot of nutrients to survive.

• They are the largest organisms in the ecosystem.

In a mutualistic relationship, how do the species involved interact?

• Both species are harmed.

• One benefits, the other is unaffected.

• Both species benefit.

• One benefits, the other is harmed.

What type of organism is a decomposer?

• An organism that produces its own food

• An organism that consumes only plants

• An organism that hunts and kills prey

• An organism that breaks down dead matter externally

Which of the following is a density-independent factor?

• Predation

• Weather

• Competition

• Disease