Ch01 Study Guide - Introduction to Biology

Vocabulary flashcards covering key concepts, definitions, and themes from Chapter 01 Study Guide.

Five Main Unifying Themes in Biology

The core overarching themes that organize biological study: Organization, Information, Energy and Matter, Interactions, and Evolution.

Hierarchical Levels of Biological Organization

The sequential structural levels of life, ordered from broadest to smallest: Biosphere, Ecosystems, Communities, Populations, Organisms, Organs, Tissues, Cells, Organelles, and Molecules.

Reductionism

An approach that breaks down complex biological systems into simpler, more manageable components to study them.

Systems Biology

An approach to studying biology that models the dynamic behavior of whole biological systems based on interactions among the system's parts.

Emergent Property

Novel properties that arise at each higher level of biological organization that were not present at the preceding level, due to the arrangement and interactions of parts.

Cell Theory

The fundamental biological principle stating that all living organisms are composed of cells, and that all cells arise from pre-existing cells.

Prokaryotic Cell

A cell lacking a membrane-enclosed nucleus or membrane-enclosed organelles, found in the domains Bacteria and Archaea.

Eukaryotic Cell

A cell containing membrane-enclosed organelles, including a membrane-bound nucleus housing its DNA, found in plants, animals, fungi, and protists.

Heredity

The transmission of traits from one generation to the next through genetic information.

DNA (Deoxyribonucleic Acid)

The genetic material transmitted from parents to offspring that encodes instructions for building proteins and directing cellular activities.

Gene

A discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA.

Gene Expression

The process by which information encoded in a gene directs the synthesis of a functional gene product, such as a protein.

Genomics

The large-scale study of whole sets of genes and their interactions within or across species.

Proteomics

The systematic study of sets of proteins and their properties, including their structures, functions, and interactions.

Bioinformatics

The use of computational tools, software, and databases to store, organize, and analyze large volumes of biological data.

Energy Flow and Nutrient Cycling

The biological principle stating that energy flows through an ecosystem in one direction (entering as light and exiting as heat), whereas chemicals and nutrients cycle continuously within it.

Producers

Organisms, such as plants, that convert light energy into chemical energy stored in organic molecules.

Consumers

Organisms that obtain energy and nutrients by feeding on other organisms or their organic remains.

Negative Feedback Regulation

A form of regulation in which accumulation of an end product slows down or reduces its own production process.

Positive Feedback Regulation

A form of regulation in which an end product speeds up or amplifies its own production process.

Climate Change

A directional change to global climate lasting three decades or more, driven in large part by human activities such as fossil fuel combustion.

Evolution

The overarching theme of biology defined as biological change over time, where living species accumulate modifications from common ancestors as they adapt to changing environments.

Natural Selection

A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.

Taxonomy

The branch of biology named for identifying, naming, and classifying organisms.

Taxonomic Ranks

The hierarchical sequence used to classify organisms, ordered from broadest to most specific: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

Binomial Scientific Name

A two-part formal naming system for a species consisting of a capitalized Genus name followed by a lowercase species epithet, both italicized (e.g., Homo sapiens).

Scientific Inquiry

The search for information and explanations of natural phenomena using observations, testable hypotheses, and experimentation.

Inductive Reasoning

A type of logic in which general conclusions are derived from a large number of specific observations.

Deductive Reasoning

A type of logic in which specific predictions are derived from general premises or hypotheses using 'if… then' statements.

Hypothesis

An explanation based on observations that leads to testable and falsifiable predictions.

Scientific Theory

A broad, comprehensive explanation supported by a vast body of evidence, which differs from commonplace usage where 'theory' is often misused to mean an untested guess or speculation.

Experiment

A scientific test carried out under controlled conditions to manipulate one or more factors and observe the outcome.

Independent Variable

The variable in an experiment that is intentionally changed or manipulated by the experimenter.

Dependent Variable

The variable in an experiment that is measured to determine if it changes in response to the independent variable.

Control Treatment

A baseline group in an experiment that is kept in unmanipulated conditions to rule out unwanted factors and isolate the effect of the independent variable.

Scientific Model

A visual, conceptual, or physical representation of a complex natural biological phenomenon, process, or structure used to study and explain it.