ZOO 2700 Lecture Notes - Lecture 2: Zoology, Ernst Haeckel, Cnidaria
Document Summary
The role is warning: reflecting light (not producing it) A single view of life (with new data, this may change) Connections between species are not solved, some are unsure. Darwin: (cid:498)the facility in examining the smaller invertebrate animals, either would be at first expected(cid:499) Dramatic change in landscape in uk between 1770-1850. Fuelled by coal, removed forest, changed air, dark. Rise in productivity in world fuelled by coal. Biston betularia came in 2 varieties: light (typical) and dark (carbonaria) Coal use around the world decreased, and the frequency of dark moths caught increased since the bark became lighter and stood out more. Variation is heritable: suggestions are that a narrow region on chromosome 17, where a single gene variant is probably responsible for the peppered moths melanism (although which one is still unknown) Overproduction of offspring: estimated # eggs/female = 350.