Energy Transfer and Ecosystem Dynamics

The video covers Unit 1 of the AP Living Environment course, focusing on predator-prey dynamics, symbiosis, competition, biodiversity, biomes, biogeochemical cycles, energy flow, and productivity. It provides examples and study tips, emphasizing the importance of understanding key concepts and practicing FRQs.

What happens to predator populations when prey populations increase?

• Predator populations decrease.

• Predator populations remain constant.

• Predator populations become extinct.

• Predator populations increase.

Which of the following is an example of mutualism?

• A lion hunting a zebra.

• A tick feeding on a dog.

• A clownfish living in a sea anemone.

• A bird nesting in a tree.

What is resource partitioning?

• When a species becomes extinct due to lack of resources.

• When one species benefits at the expense of another.

• When two species compete for the same resource.

• When species share resources to coexist in the same niche.

Which continent is Ethiopia located in?

• Africa

• Australia

• South America

• Asia

What is the primary focus of biogeochemical cycles?

• The flow of energy through ecosystems.

• The recycling of nutrients in the environment.

• The geographic distribution of biomes.

• The competition between species for resources.

According to the rule of 10, how much energy is transferred from one trophic level to the next?

• 1%

• 10%

• 50%

• 100%

What does the first law of thermodynamics state about energy?

• Energy can be transferred but not created or destroyed.

• Energy can be created and destroyed.

• Energy is only used by producers.

• Energy is always increasing in the universe.

What is the difference between gross and net primary productivity?

• Gross is the total energy, net is after energy used by producers.

• Gross and net are the same.

• Gross is the energy used by consumers, net is the total energy.

• Gross is after energy used by producers, net is the total energy.

Which biome is likely to have a high net primary productivity?

• Tundra

• Desert

• Rainforest

• Open ocean

Why do deserts have low net primary productivity?

• They have a high volume of phytoplankton.

• They have little precipitation and few producers.

• They have abundant plant life.

• They have high precipitation.