Ecology and Plant Processes

The video tutorial covers various ecological cycles, including the carbon, oxygen, nitrogen, and water cycles, explaining their processes and human impacts. It also discusses population limiting factors, both biotic and abiotic, and explores symbiotic relationships in ecosystems, such as parasitism, commensalism, and mutualism.

Which of the following is a primary source of carbon in the carbon cycle?

• Water

• Fossil fuels

• Animals

• Plants

What process do plants use to take in carbon dioxide?

• Transpiration

• Condensation

• Photosynthesis

• Respiration

Which organisms are primarily responsible for releasing oxygen into the atmosphere?

• Plants

• Fungi

• Animals

• Bacteria

What is the main form of nitrogen that plants can use after nitrogen fixation?

• Ammonia

• Nitrites

• Nitrates

• Nitrogen gas

Which process in the water cycle involves water vapor cooling and forming liquid droplets?

• Evaporation

• Condensation

• Precipitation

• Transpiration

What is the term for the process where liquid water from plant leaves turns into gas?

• Condensation

• Precipitation

• Evaporation

• Transpiration

Which of the following is an abiotic factor that can limit population size?

• Competition

• Sunlight

• Disease

• Predation

What type of symbiotic relationship benefits one organism while the other is unaffected?

• Parasitism

• Mutualism

• Commensalism

• Predation

In a predator-prey relationship, what happens to the predator population when the prey population increases?

• It remains the same

• It fluctuates randomly

• It decreases

• It increases

Which of the following is a density-independent factor affecting population size?

• Natural disasters

• Competition

• Parasitism

• Disease