BIO-1103 Lecture Notes - Lecture 11: Superorganism, Second Voyage Of Hms Beagle, Her Majesty'S Ship
Document Summary
Lamarckianism: an early (and incorrect) idea about evolution. Lamarck hypothesized that traits acquired in one"s lifetime are passed on to offspring: the farther a giraffe strained its neck to eat leaves from higher branches, over time it would develop a longer neck. It would then pass this acquired trait on to its offspring and they would be born with longer necks: later proved to be incorrect. It is older than 6000 years, meaning that the adapted species would have had appropriate amount of time to change like they had. Convergent evolution: anteater- specially adapted nose/snout to finding insects, anteater in africa, spiny anteater/ echidna in australia- straddling the line between reptile and mammal, armadillo- north america fees on insects. Though they may not be closely related, they converge in their appearance to adapt to their different environments. Very distant lines look the same way because they make their livings the same way and need the same features.
