Cells and Genetics
Ecosystem Dynamics
Cycling of Matter
Human Impacts
Fun Facts
100
This process converts light energy into chemical energy as glucose.
What is photosynthesis?
100
Organisms at this trophic level convert solar energy into chemical energy.
What are primary producers?
100
This process by which plants absorb CO₂ from the atmosphere is a major entry point into the carbon cycle.
What is photosynthesis?
100
The increase of this greenhouse gas due to burning fossil fuels is a major driver of climate change.
What is CO2?
100
This tiny creature can survive in outer space, boiling water, and frozen tundra.
What is a tardigrade?
200
These cells have a cell wall and chloroplasts.
What are plant cells?
200
An organism that is introduced to a new environment and causes ecological harm is known as this.
What is an invasive species?
200
Decomposers break down dead matter and release this element back into the soil and atmosphere.
What is carbon?
200
Deforestation in tropical rainforests most directly reduces this ecological factor, leading to species loss.
What is biodiversity?
200
This part of your body is made of the same protein as rhino horns.
What is hair or fingernails?
300
Even though all body cells have the same DNA, only certain genes are activated. This process is known as this.
What is gene expression?
300
This term describes the maximum population size an environment can sustainably support.
What is carrying capacity?
300
This group of organisms is responsible for converting atmospheric nitrogen into forms plants can use.
What are nitrogen-fixing bacteria?
300
When excess atmospheric CO₂ dissolves in the ocean, it causes this harmful chemical process.
What is ocean acidification?
300
This is the only part of the human body that can’t feel pain, even if you poke it.
What is your brain?
400
This type of cell division results in daughter cells with half the number of chromosomes, essential for sexual reproduction.
What is meiosis?
400
The specific role or "job" of an organism within its ecosystem is called this.
What is a niche?
400
This cycle involves atmospheric fixation, assimilation by organisms, and return through decomposition or denitrification.
What is the carbon cycle?
400
The expansion of urban areas often leads to habitat fragmentation, which limits this critical movement of wildlife.
What is gene flow?
400
This animal can detect electrical signals from prey—even in total darkness underwater.
What is a platypus?
500
A mutation that changes a codon to a stop codon results in this type of mutation.
What is a nonsense mutation?
500
This law of thermodynamics explains why only about 10% of energy is transferred from one trophic level to the next.
What is the second law of thermodynamics?
500
Excess nitrogen and phosphorus from agriculture can lead to this phenomenon in aquatic systems.
What is eutrophication?
500
This term describes the total amount of land and resources a person or population requires to sustain their lifestyle.
What is an ecological footprint?
500
This fruit is technically a berry, but you might be shocked to learn it’s actually related to the banana.
What is a tomato?