Biotic and Abiotic Factors

Mr. Anderson's video explores biotic and abiotic factors, starting with definitions and examples. He discusses biofilms at the cellular level, predator-prey relationships at the organism level, and the impact of keystone species on ecosystems. The video highlights the interconnectedness of life and how changes in one area can affect entire ecosystems.

What is a biotic factor?

• A type of weather pattern

• A chemical element in the atmosphere

• A living component of an ecosystem

• A non-living component of an ecosystem

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

• Snowshoe hare

• Wolves in Yellowstone

• Temperature

• Elk population

What is a biofilm?

• A layer of bacteria that forms on surfaces

• A type of virus

• A type of algae

• A type of fungus

Why are biofilms difficult to treat with antibiotics?

• They are too small to be targeted

• They are protected by a slime layer

• They are resistant to all chemicals

• They are not affected by temperature changes

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

• The lynx population decreases

• The lynx population remains stable

• The lynx population increases

• The lynx population becomes extinct

What is the primary prey of the Canada lynx?

• Elk

• Beavers

• Snowshoe hare

• Coyotes

What happened to the elk population when wolves were removed from Yellowstone Park?

• It increased

• It became extinct

• It remained the same

• It decreased

How did the removal of wolves affect the beaver population in Yellowstone?

• Beaver population became extinct

• Beaver population increased

• Beaver population decreased

• Beaver population remained stable

What is a keystone species?

• A species that has little impact on its ecosystem

• A species that is the most abundant in an ecosystem

• A species that has a disproportionately large impact on its ecosystem

• A species that is the smallest in size in an ecosystem

What is the main takeaway about ecosystems from the video?

• Ecosystems are simple and predictable

• Ecosystems are solely dependent on abiotic factors

• Ecosystems are complex and interconnected

• Ecosystems are unaffected by changes