What is a species?

What can adaptations do?

What is the interdependence of living things?

What could happen to organisms poorly adapted to their environment?

What can make a species go extinct?

How can humans be responsible for extinction of certain species?

Plants absorb a _____ percentage of the Sun's energy for photosynthesis

How can energy be transferred in the ecosystem?

In a food chain, what percentage of energy is passed onto the next trophic level?

In a food chin, where does most of the energy go?

What happens as less energy is transferred at each trophic level?

How do all cells contain carbon?

How can carbon dioxide be removed from the atmosphere?

How can carbon dioxide be returned to the atmosphere?

How can carbon be passed from one organism to the next?

Why do materials from living things decay?

Why do plants and animals need nitrogen?

Why can't nitrogen from the air be used by plants and animals?

What is nitrogen fixation?

How can lightning cause nitrogen fixation?

What do nitrogen-fixing bacteria do?

What is the Haber process?

How can nitrogen compounds be returned to the soil?

What does denitrifying bacteria do?

When did the first living things exist?

What is the main theory for life on Earth beginning?

What happens with replicating molecules?

Who was Charles Darwin and what was his theory of evolution?

Darwin's theory of evolution occurs through natural selection, what is it?

What happens if an individual is poorly adapted to its environment?

What type of variation allows the change to pass onto the offspring?

What would happen if conditions on Earth in the past were different?

What is selective breeding?

What are mutations?

Why does it matter in which cells mutations occur?

How can we determine if a new species has been created?

Why do some people not agree with the theory of natural selection?

Who was Jean-Baptiste Lamark and what was his theory?

Why can't Jean-Baptiste Lamark's theory account for all observations on Earth?

Why can scientists find it hard to accept new theories?

What evidence is there for Darwin's theory?

What is biodiversity?

What characteristics can the classification or organisms be determined by?

How can classification help scientists?

Why is maintaining biodiversity important?

What is monoculture?

What are the disadvantages of monoculture?

Why isn't it preferred to use biodegradable materials for packaging?

What factors are there in reducing sustainability?