Life's Layers - CrashCourse

1. What term is used to describe the different layers of biological organization?

• Biological hierarchy

• Levels of biological organization

• Ecosystems

• Food chains

2. Which of the following is an example of an emergent property?

• A single cell

• A group of similar cells forming tissues

• An individual organism

• All of the above

What concept explains how forms of life fit their functions?

• Symbiosis

• Evolution

• Adaptation

• Homeostasis

What structure in a humpback whale helps it filter krill from water?

• Teeth

• Baleen

• Gills

• Tongue

What does the term homeostasis refer to?

• Maintaining stable internal conditions

• The process of evolution

• The formation of new species

• The food chain

Which of the following represents a higher level of biological organization after a population?

• Cell

• Organ

• Organism

• Community

How does energy flow through the biosphere?

• It does not flow

• It is recycled

• In one direction only

• In multiple directions

What happens to the elements like carbon and nitrogen in the biosphere?

• They are created anew

• They disappear over time

• They are recycled continuously

• They only exist in plants

What is a primary theme of life mentioned in the video?

• Life is chaotic

• Life depends on a flow of information, energy, and chemicals

• Life is only found in oceans

• Life has no order

What role does soil play in the ecosystem, according to Dr. Berhe?

• It is just dirt

• It has no importance

• It only grows plants

• It stores carbon and supports life