What Themes Repeat in Biology?
What is the basic unit of life?
The cell.
What do we call a group of organisms of the same species living in the same area?
A population.
What is the process in which water moves between the earth and the atmosphere?
The water cycle.
Name one of the levels of organization in biology
Organism, population, community, ecosystem, or biosphere.
What is the term for all the different populations that live together in an area?
A community.
What gas do plants take in during photosynthesis?
Carbon dioxide (CO₂).
What theme explains why different species share similarities?
The theme of unity and diversity of life.
What is biodiversity, and why is it important?
Biodiversity is the variety of life in an area; it is important because it helps ecosystems stay stable and resilient.
Which cycle recycles nitrogen for use by plants and animals?
The nitrogen cycle.
Which theme in biology deals with how organisms respond to their environment?
Interaction with the environment.
Give an example of how organisms interact with both living and nonliving things in their environment.
Example: A tree (living) uses sunlight (nonliving), water (nonliving), and provides food for animals (living).
How do animals return carbon dioxide to the atmosphere?
Through respiration (breathing out).
Explain how structure and function are related in living things, using one example.
Structure determines function
Explain why ecosystems are considered complex systems.
Ecosystems involve many organisms interacting with each other and with nonliving factors, creating interdependence and balance.
Explain how the water, carbon, and nitrogen cycles all connect to sustain life.
They recycle essential resources—water for hydration, carbon for energy/structure, nitrogen for proteins/DNA—allowing ecosystems to function.