The difference between a unicellular organism and a multicellular organism.
What is the fact that unicellular organisms have a single cell and multicellular organisms have multiple cells?
100
The part of Earth that organisms live.
What is the biosphere?
100
Honeybees interacting with flowers is an example of this type of interaction.
What is mutualism?
100
Other than bacteria, this is another electrifying way that nitrogen fixation can occur.
What is lightning?
100
Of primary succession and secondary succession, the one where growth occurs more quickly.
What is secondary succession?
200
The ability of an organism to keep its internal environment stable in response to external environmental changes.
What is homeostasis?
200
The difference between biology and ecology.
What is biology's study of life and ecology's focus on the relationships between organisms and the environment?
200
The difference between primary succession and secondary succession.
What is the fact that primary succession begins where life hasn't been before and secondary succession takes place in areas where life has existed before?
200
The importance of decomposers in the nitrogen cycle.
What is breaking down nitrogen into usable compounds?
200
The largest number of one species an environment can hold without harmful effect.
What is carrying capacity?
300
The four unifying themes in biology.
What are cells and genes, biological organization, interaction, and origins?
300
Two ways that the hydra shows complexity.
What are its ability to attack prey with cnidocytes, move with tentacles, and regenerate after losing parts of its body?
300
A relatively stable community reached through succession.
What is a climax community?
300
The two products produced through decomposition in the nitrogen and carbon cycles.
What are fossil fuels (carbon) and ammonia (nitrogen)?
300
The four types of interactions among species.
What are mutualism, commensalism, parasitism, and predation?
400
The reason why we do not have solid scientific evidence for the origin of life.
What is the fact that none of us were around when it happened?
400
The definition of an ecosystem.
What is a system made of the living community and the nonliving things that interact with them in that same community in the same time?
400
The difference between parasitism and predation.
What is the fact that parasitism involves a gradual death/deterioration and predation involves a sudden death?
400
Three other cycles besides the nitrogen and carbon cycles.
What are water, reproductive, seasonal, and predator-prey?
400
A major theory that creation scientists and evolutionists agree upon.
What is microevolution?
500
The difference between macroevolution and microevolution.
What is the fact that macroevolution involves large changes (fish to a bird) while microevolution involves small changes (birds' beaks)?
500
The organization of biology from biosphere to organism.
What is biosphere, biome, ecosystem, community, population, organism?
500
Two examples of commensalism in nature.
What are birds in a tree and a remora fish and shark?
500
The five main steps of the carbon cycle.
What are photosynthesis, consumption of carbon in plants and animals, respiration, decomposition, and the burning of fossil fuels?
500
The four main steps of the nitrogen cycle.
What are plants getting nitrogen through soil and water, animals get nitrogen from plants or animals, organisms die producing ammonia, ammonia is converted into nitrites and nitrates and returns to the atmosphere?