"

Glossary

adaptations

Heritable traits that improve survival and reproduction in a given environment

adenosine triphosphate (ATP)

The cell’s energy currency

aerobic cellular respiration

definition

allele frequency

Rate at which a specific allele appears within a population.

alleles

A gene variation.

amino acid

A monomer of a protein.

autosomal recessive

A description of a genetic trait or condition that can be passed down from parent to child. The trait is recessive located on a autosomal chromosome.

byproducts

A substance produced during a biochemical process but is not the primary or intended product of that process

cancellation method

A mathematical process used to converting measurements between units by systemically eliminating units in calculations.

carbon dioxide (CO₂)

A colorless, odorless gas

cellular

The fundamental unit of life; a plasma membrane surrounding cytoplasm containing other structures, such as DNA

cellular respiration

The process by which cells convert chemical energy from glucose (C6H12O6) into usable energy (ATP)

chemical equation

A symbolic representation of a chemical reaction

chemical reaction

A process leading to rearranging atoms in molecules.

citric acid cycle

A series of enzyme-catalyzed chemical reactions of central importance in all living cells for extraction of energy from carbohydrates; Als known as the Kreb Cycle.

codon

Three consecutive nucleotides in mRNA that specify the insertion of an amino acid or the release of a polypeptide chain during translation

control group

Group of data points, observations, or subjects that Is not exposed to the condition that is being studied but otherwise treated identically to the experimental group.

Deoxyribonucleic acid (DNA)

Double-helical molecule that carries the cell's hereditary information.

dependent variable

A factor that is an effect that can be observed and measured which may be caused by the independent variable.

diploid

A cell, nucleus, or organism containing two sets of chromosomes (2n).

electron transport chain

A group of proteins that pass energized electrons and use the energy released by the electrons to move hydrogen ions against their concentration gradient.

enzyme

A catalyst in a biochemical reaction that is usually a complex or conjugated protein.

epidemiological

A branch of medicine that studies incidence, distribution and possible control of diseases and other factors relating to health

evolution

A genetic change in populations across generations over a period of time.

experimental group

Group of data points, observations, or subjects that Is exposed to the condition that is being studied but otherwise treated identically to the control group.

fertilization

The process where a sperm units with an egg (ovum) which results in a zygote.

fitness

Organism’s ability to survive and reproduce.

gene

A physical and functional unit of heredity, a sequence of DNA that codes for a protein.

gene expression

The process that produces function protein or ribonucleic acid (RNA) from a gene.

gene pool

All the alleles that the individuals in the population carry

gene regulation

The process that induces or represses the expression of a gene

genetic

The study of genes, genetic variation, and heredity in organisms

genetics

The study of genes, genetic variation, and heredity in organisms.

genome

A cell, nucleus, or organism complete set of chromosomes.

genotype

The genetic makeup for a particular trait in an organism.

glucose (C6H12O6)

A monomer of a carbohydrate; simple carbohydrate.

glycolysis

A process of breaking glucose into two three-carbon molecules with the production of ATP and NADH.

graph

A visualization to present, interpret, and summarize data.

heart rate

The number of times your heart beats per minute.

hereditary

The passing of traits from one generation to another.

heterozygous

Having two different alleles for a given gene on the homologous chromosome.

hypothesis

A proposed explanation of a phenomenon within the natural world.

imperial system

A decimal system of weights and measurements that is historically used in the British Empire.

independent variable

A factor that may cause an effect that can be observed and measured in the dependent variable.

International System of Units [SI]

A decimal system of weights and measurements in which the basic units are meter (m) for length, gram (g) for mass, and liter (l) for volume.

macroevolution

Broader scale evolutionary changes that scientists see over paleontological time.

macromolecule

Large molecule made up of small building blocks or subunits.

mean

The average of the set of numbers.

median

The middle number of a set when the data is arranged in ascending or descending order.

metric system

A decimal system of weights and measurements in which the basic units are meter (m) for length, gram (g) for mass, and liter (l) for volume.

microevolution

Changes in a population’s genetic structure

mode

The most frequently occurring number in the data set.

mutation

A variation in the nucleotide sequence of a genome.

natural selection

Reproduction of individuals with favorable genetic traits that survive environmental change because of those traits, leading to evolutionary change

nucleotide

A monomer of nucleic acids; contains a pentose sugar, one or more phosphate groups, and a nitrogenous base

oxygen (O₂)

A chemical element.

percentage (%) change

The relative difference between an old value and a new value, as a percentage of the original value

phenotype

The observable trait expressed in an organism.

photosynthetic

A chemical process that converts light energy into chemical energy.

prediction

The expected results of an experiment.

prefixes

A word or letter placed before another word; A word before the base unit to measure quantity larger or smaller than the base unit.

protein

A biological macromolecule comprised of one or more amino acid chains.

Punnett Square

A visual representation of a cross between two individuals in which the gametes of each individual are denoted along the top and side of a grid, respectively, and the possible zygotic genotypes are recombined at each box in the grid

random sampling

A technique used to select a subset of individuals or observations from a larger population in such a way that every member has an equal chance of being chosen.

red blood cell

A small (7–8 μm) biconcave cell without mitochondria (and in mammals without nuclei) that is packed with hemoglobin, giving the cell its red color; transports oxygen through the body

reproductive success

Individual's production of offspring per breeding attempt or lifetime

ribonucleic acid (RNA)

A single-stranded, often internally base paired, molecule that is involved in protein synthesis.

ribosomes

A cellular structure that carries out protein synthesis.

RNA polymerase

An enzyme that produces RNA that is complementary to the DNA template

sample size

The number of data points, observations, subjects, or replicates that are collected in each control and experimental group.

scientific method

A comprehensive and flexible process of examination and discovery of natural phenomena.

scientific notation

A represent numbers by using significant digits multiplied by 10 raised to power or exponent.

sickle cell anemia

A genetic disorder that affects the shape of red blood cells, and their ability to transport oxygen and move through capillaries.

standard deviation

The spread of the data is around the mean and indicates the level of variability within the dataset.

statistics

A discipline of mathematics that deals with interpreting, analyzing, and organizing data in order to identify patterns, make informed decisions, and draw conclusions.

transcription

The process through which messenger ribonucleic acid (RNA) forms on a template of deoxyribonucleic acid (DNA)

translation

The process through which ribonucleic acid (RNA) directs the protein's formation.

tRNA

A RNA that carries activated amino acids to the site of protein synthesis on the ribosome.

variable

A factor, trait, or condition that can be controlled, changed, or measured in an experiment.

X-axis

The horizontal axis of a graph.

Y-axis

The vertical axis of a graph.

License

Icon for the Creative Commons Attribution-NonCommercial 4.0 International License

Survey of Biology Lab Manual Copyright © 2025 by Thomas Hardy; Grace Lee; and David Taylor is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, except where otherwise noted.