Essential Elements and Environmental Factors in Living Organisms

The video explores the essential elements in nature, focusing on Liebig's law of minimum and Blackman's law of limiting factors. It discusses the range of tolerance for organisms, Shelford's law of tolerance, and the zones of compatibility and intolerance. The video emphasizes the importance of adaptations to environmental stress and the responsibility humans have to protect natural habitats.

What are the essential elements used by living organisms for survival?

• Only carbon and oxygen

• Only trace elements

• 16 naturally occurring elements

• All elements in the periodic table

According to Liebig's law of minimum, plant growth depends on which factor?

• The factor that is most abundant

• The factor required in trace quantity

• The factor that is least important

• The factor available in the largest quantity

Which of the following is NOT one of the five factors identified by Blackman that affect photosynthesis?

• Amount of sunlight

• Water

• Nitrogen

• Temperature of chloroplast

What happens to an organism when environmental factors exceed its range of tolerance?

• It thrives and reproduces

• It remains unaffected

• It experiences physiological stress

• It becomes more active

What is the Zone of Compatibility?

• A region where organisms experience lethal conditions

• A region where organisms are extinct

• A region where organisms thrive without stress

• A region where organisms cannot survive

What is the Zone of Intolerance?

• A region where organisms thrive

• A region where organisms experience physiological stress

• A region where organisms are unaffected

• A region where organisms cannot survive

How do polar bears adapt to temperatures below their normal threshold?

• By changing their diet

• By migrating to warmer areas

• By increasing their metabolic activity

• By hibernating

What is estivation?

• A feeding behavior

• A migration pattern

• A summer sleep

• A winter sleep

Why is it important to preserve natural habitats?

• To promote global warming

• To maintain the conditions organisms have adapted to

• To increase pollution

• To reduce biodiversity

What inspires us to act in a way that benefits nature?

• Increasing pollution

• Feeling the pain of suffering life forms

• Focusing on economic growth

• Ignoring environmental issues