BIOL 1202 : Exams 1 And 2 3
Document Summary
Pre-darwinian theory of evolution: lamarck, inheritance of acquired characteristics, bodies of living organisms are modified through the use or disuse of parts, these modifications are inherited by offspring, this idea turned out to be wrong. Artificial selection: selective breeding of organism to encourage the occurrence of desirable traits, analogous to natural selection. Concept 22. 3 - evolution is supported by an overwhelming amount of scientific evidence. Homologous: structures or other attributes in different species that resemble each other because of common ancestry, ex. Mammalian forelimbs: vertebrate embryos, all vertebrates share similar developmental genes, differences arise by some genes being switched on or off at varying times during development. Analogous: structures that are similar in function but not in structure and developmental and evolutionary origin. Scala naturae: ladder of nature (see page 453, evolution not about climbing ladder of nature from lower to higher, evolution is a bush with lineages branching from one another.
