Prep Bundle | Real Exam Questions
and Complete Answers with Step-by-
Step Solutions (Already Passed A+)
2026/2027
• emergent properties -✓✓• arise when the interaction of individual components
produce new, more complex behaviors as a collective that does not exist at lower
levels of organization.
Properties of the system as a whole rather than properties that can be derived from
the properties of the individual system components
i.e. heart cells < heart < ability to pump blood
• unicellular organisms -✓✓• consists of a single cell
ie. bacteria and protozoans
• multi-cellular organisms -✓✓• consists of interdependent cells
ie. plants and animals
• population -✓✓• a group of organisms of the same kind that live together in the
same place
• a population has characteristics such as its birth or death rate
ie. The humans who occupy the island of Tahiti
• Hierarchy of Life (5 in order) -✓✓Cells, multicellular organism, population,
community, ecosystem and biosphere
, • Taxonomic Hierarchy (7) -✓✓Domain, Kingdom, Phylum, Class, Order, Family,
Genus, Species
Pneumonic: "Dear King Philip Came Over For Good Soup"
• community -✓✓populations of all species that occupy the same area form a
community
Communities can be described in terms of their /diversity/ and their /stability/
ie. algae, snails, sea urchins, and other organisms
that live together, make up a community
• ecosystem -✓✓biological communities interacting with their shared physical
environment.
• includes the community and the nonliving environmental factors
ie: community of living organisms, as well as rocks, air, seawater, minerals, and
sunlight
• biosphere -✓✓Highest level of organization
ie: all regions of Earth's crust, waters, and atmosphere that sustain life
• DNA (deoxyribonucleic acid) -✓✓is a large, double-stranded, helical molecule
that contains instructions for assembling a living organism from simpler molecules
The two stands in a molecule of DNA each consist of a chain of chemical building
blocks called nucleotides
• The hierarchy of life biology (diagram) -✓✓
• genome -✓✓• an organism's complete set of genetic instructions containing all of
the information needed to build that organism and allow it to grow and develop
All of the DNA in the cells of a living organism constitute its genome.