chapter 5 Flashcards
(9 cards)
biological evolution
change to heritable characteristic over time in living organisms
cumulative changes occurring within a population between on gen to the next
heritable characteristics are encoded for by
genes
heritable characteristics may be transferred between generations as
allele
concise definition for biological evolution
change in allele frequency of a populations gene pool over successive generations
fossil record as evidence for evolution
reveals features of an ancestor for comparison w living descendants
records show that over time changes in features of living organisms occured
fossils
preserved remains or trace of organism from remote past
preserved remains (body fossils)
direct evidence of ancestral form (includes bones, teeth, shells, leaves)
traces of remains
indirect evidence of ancestral forms, include footprint, tooth mark, burrow, faeces
fossil records
totality of both undiscovered and discovered fossils