ANTH 102 Chapter Notes - Chapter 9: Symmetry In Biology, Convergent Evolution
Document Summary
Taxonomy: earlies primate like creature emerged when a milder climate returned. Favors the spread of dense and tropical and subtropical forests: development of arboreal (tree living) mammals. Small size of early primates allowed them to use tree branches not accessible to other predators. Includes leaves flowers fruit insects birds eggs etc: most primate species today are dinural active during day, derived trait. Features that appear more recently in evolutionary history: ancestral traits. Occur in present day species and ancient forms. Two or more distinct forms develop similarities to one another due to shared ancestry. Such as wings of birds, butterflies and bats. Emerges when environment exerts similar pressures on distantly related organisms causing them to resemble each other: primate level divides into 2, grade. Overall similarity of body plans within taxomic groups: clade. Examination of shared sequences of dna and rna allows.
