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Stack #4665638

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Species he basic, fundamental unit of biological classification (taxonomy) representing a group of organisms that can interbreed in nature and produce fertile offspring.
Evolution the change in the heritable characteristics—specifically the genetic composition (allele frequencies)—of biological populations over successive generations.
Fossil any preserved remain, impression, or trace of a once-living organism from a past geological age, generally at least 10,000 years old
Adaptation a heritable trait—physical, behavioral, or functional—that enhances an organism’s survival and reproduction in a specific environment, developed over generations through natural selection
Scientific theory a well-substantiated, comprehensive explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested, confirmed, and validated through observation and experimentation
Natural selection mechanism of evolution
Competition a fundamental interaction between organisms or species striving for limited resources
Sexual selection a mode of natural selection where members of one biological sex compete for access to mates or are chosen by the opposite sex, leading to higher reproductive success.
Coevolution the process where two or more species reciprocally affect each other's evolution through close ecological interactions, such as predator-prey, host-parasite, or mutualistic relationships
Fossil record the total, chronological collection of all discovered fossils—including bones, teeth, imprints, and traces—preserved in Earth's sedimentary rock layers
Embryo the earliest developmental stage of a multicellular organism, beginning with the first mitotic division of a fertilized egg (zygote) and continuing until it becomes a fetus
Homologous structures physical features, organs, or traits in different organisms that share a common evolutionary origin and ancestry, even if they serve different functions.
Extinct he complete and permanent disappearance of a species, subspecies, or group of organisms from Earth, occurring when the last living member dies.
Vestigial organs degenerate, atrophied, or rudimentary anatomical structures in an organism that have lost most or all of their original ancestral function through evolution
Molecular clock a scientific technique used in evolutionary biology to estimate the timing of lineage splits (speciation) by measuring the number of accumulated mutations in DNA, RNA, or amino acid sequences over time
Relative dating a scientific method used in geology and archaeology to determine the chronological order of past events, fossils, or rock layers without determining their exact numerical age
Absolute dating the scientific process of determining a specific numerical age or date range (in years) for fossils, rocks, artifacts, or geological events.
Created by: user-2020282
 

 



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