Cells and Cell Parts
Heredity and DNA
Viruses and Bacteria
Ecosystems and Environments
Food Webs
100
This organelle is known as the "powerhouse of the cell."
What is the mitochondrion?
100
DNA stands for this.
What is deoxyribonucleic acid?
100
Bacteria are this type of cell: they do not have a nucleus.
What is prokaryotic?
100
This is the living part of an ecosystem.
What are biotic factors?
100
These organisms make their own food.
What are producers?
200
This part of the cell controls what enters and leaves the cell.
What is the cell membrane?
200
Traits are passed from parents to offspring through these.
What are genes?
200
Viruses need this to reproduce.
What is a host cell?
200
A group of the same species living in the same area.
What is a population?
200
Animals that eat only plants.
What are herbivores?
300
Plant cells have this structure that gives them shape and support, but animal cells do not.
What is the cell wall?
300
A chart used to show possible gene combinations in offspring.
What is a Punnett square?
300
This helpful use of bacteria occurs in yogurt and cheese production.
What is fermentation?
300
This cycle moves water through the environment.
What is the water cycle?
300
This shows how
energy moves through an ecosystem.
What is a food web or food chain?
400
This jelly-like substance fills the cell and holds the organelles.
What is cytoplasm?
400
This molecule carries the instructions to make proteins.
What is RNA?
400
This part of a virus attaches to the host cell.
What is the protein coat or surface proteins?
400
What breaks down dead things ?
What are decomposers ?
400
These organisms break down dead material and return nutrients to the soil.
What are decomposers?
500
This part of the cell contains the DNA.
What is the nucleus?
500
What is a double helix?
500
Antibiotics can treat these but not viruses.
What are bacterial infections?
500
This biome is cold and dry with permafrost soil.
What is the tundra?
500
In an energy pyramid, most energy is found at this level. 
What is the producer level?