Ecological Concepts and Relationships

The video tutorial covers ecosystems and communities, focusing on biomes, weather vs. climate, and the greenhouse effect. It explains the concepts of habitats and niches, tolerance, and competition among species. The tutorial also discusses symbiotic relationships, including mutualism, parasitism, and commensalism, highlighting the role of keystone species in ecosystems.

What is the main difference between weather and climate?

• Weather is the average condition over many years, while climate changes hourly.

• Weather and climate are the same and change hourly.

• Weather is the day-to-day condition, while climate is the average condition over many years.

• Weather is the average condition over many years, while climate is the day-to-day condition.

Which of the following best describes a microclimate?

• A region with extreme weather conditions.

• A place where climate changes rapidly.

• A large area with uniform climate conditions.

• A small area with climate conditions different from the surrounding area.

What role do greenhouse gases play in Earth's atmosphere?

• They cool the Earth's surface by absorbing heat.

• They reflect all solar energy back into space.

• They trap sunlight energy as heat, warming the atmosphere.

• They have no effect on Earth's temperature.

Which of the following is an abiotic factor defining a biome?

• Animal life

• Plant life

• Predator-prey relationships

• Soil type

How does a niche differ from a habitat?

• A niche is the physical area an organism lives in, while a habitat is its role.

• A niche is the role an organism plays, while a habitat is the physical area it lives in.

• A niche and a habitat are the same.

• A niche is larger than a habitat.

What is the range of tolerance?

• The range of conditions that are optimal for competition.

• The range of conditions that are intolerable for an organism.

• The range of conditions under which an organism can survive and reproduce.

• The range of conditions that are harmful to an organism.

What does the competitive exclusion principle state?

• Species can coexist by sharing the same resources.

• Competition leads to the extinction of one species.

• No two species can compete for the same resources indefinitely.

• Two species can share the same niche indefinitely.

What is a keystone species?

• A species that is always at the top of the food chain.

• A species that is the most abundant in its community.

• A species that causes large changes in its community when its population changes.

• A species that has little impact on its community.

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

• Neither species benefits nor is harmed.

• One species benefits, and the other is unaffected.

• Both species benefit from the relationship.

• One species benefits, and the other is harmed.

Which of the following is an example of commensalism?

• A tapeworm in a human host.

• Sea otters controlling sea urchin populations.

• Barnacles living on a whale.

• Birds eating insects off a water buffalo.