PTE

definition specifying how a study concept will be observed or measured

specify observable procedures or measures for an abstract research concept

a method in which researchers join a group's activities while observing its members

record a study plan before observing the relevant outcomes

advance recording of a study plan before relevant outcomes are observed

experiment that randomly assigns study units to intervention and comparison conditions

capable of producing a sufficiently consistent finding in repeated studies

distortion arising from how study units are selected or retained

meeting a specified statistical threshold for incompatibility with a stated null model

result of meeting a stated statistical decision threshold under a specified model

the consistency of results when the same measure is given again under similar conditions

compare or combine evidence from different methods or sources to examine a question

One of the alternative versions of a DNA sequence at a particular position in the genome.

an animal such as a frog or salamander, typically with moist skin and a life cycle that begins in water

the maximum population size that an environment can sustain over time with its available resources and conditions

a green pigment in plants, algae, and some bacteria that absorbs light used in photosynthesis

an organized structure of DNA and associated proteins that carries genetic information in a cell

a pattern of movement, sound, or appearance used by an animal to attract or gain acceptance from a mate

shedding leaves during a particular season each year and growing new ones later

an organism, such as a fungus or bacterium, that obtains nutrients by breaking down dead organic material

to evolve into a greater variety of forms or lineages over successive generations

to change an animal population over generations so that it is suited to living with and being used by humans

a gene variant whose effect on a particular trait appears when it is paired with a recessive variant

the combination of conditions, resources, and ecological interactions through which a species lives and reproduces

change over time in the species and structure of a biological community as organisms establish, grow, and alter conditions

naturally occurring only in a particular geographical area

the joining of male and female reproductive cells to form the first cell of a new organism

to search an area for food

the complete collection of gene variants present in a population at a particular time