Biotic versus Abiotic Factors in Ecosystems

Mr. Anderson's video covers biotic and abiotic factors, explaining their impact on ecosystems. He defines these factors and provides examples, such as wolves in Yellowstone and atmospheric carbon dioxide. The video delves into biofilms at the cellular level, predator-prey relationships at the organism level, and the broader ecosystem impacts of changes in food webs, highlighting the complexity and interconnectedness of life.

What is the primary difference between biotic and abiotic factors?

• Biotic factors are always beneficial, while abiotic factors are harmful.

• Biotic factors include temperature, while abiotic factors include animals.

• Biotic factors are living, while abiotic factors are non-living.

• Biotic factors are non-living, while abiotic factors are living.

Which of the following is an example of an abiotic factor?

• Wolves in Yellowstone

• Canada lynx

• Atmospheric carbon dioxide

• Snowshoe hare

What is a biofilm?

• A protective layer formed by bacteria

• A type of plant

• A type of animal

• A type of virus

Why are biofilms difficult to treat with antibiotics?

• Antibiotics cannot penetrate the protective slime layer.

• They are too small to be targeted.

• They are resistant to all forms of treatment.

• They are not affected by any chemicals.

In the predator-prey relationship between the snowshoe hare and the Canada lynx, what happens when the hare population increases?

• The lynx population decreases.

• The lynx population increases.

• The lynx population remains unchanged.

• The hare population becomes extinct.

What is the primary prey of the Canada lynx?

• Beavers

• Elk

• Snowshoe hare

• Coyotes

What was the impact of removing wolves from Yellowstone National Park?

• The elk population decreased.

• The willow population increased.

• The coyote population increased.

• The beaver population increased.

How did the reintroduction of wolves affect the ecosystem in Yellowstone?

• It had no impact on the ecosystem.

• It caused the beaver population to decrease.

• It caused the elk population to increase.

• It led to a decrease in coyote population.

What role do beavers play in affecting abiotic factors in Yellowstone?

• They decrease the wolf population.

• They build dams that alter water flow.

• They have no impact on abiotic factors.

• They increase the elk population.

What does the complexity of ecosystems demonstrate about changes in one area?

• Ecosystems are not interconnected.

• Ecosystems are simple and predictable.

• Changes in one area have no effect on other areas.

• Changes in one area can affect the entire ecosystem.