Bio280 Exam 1 (Chapters 1-4) Questions & Answers Already Graded A+

20 - 100 million - Lord Kelvin calculates in 1862 that the Earth is around _____________________________ years old 4.5 billion - How old is the earth? 6,000 - age of the Earth in years based on biblical genealogies 70,000 - Comte de Buffon hypothesized that the Earth was _________ years old based on laws of atoms and particles that explained that species were formed from organic particles after a comet strike adaptation - inherited aspect of an individual that allows it to outcompete other members of the population that lack that trait age of rocks - radioactive elements are useful when trying to determine the ______ ___ ________ artificial selection - individuals with preferred characteristics are mated or cross-pollinated with other similar individuals (encourages occurrence of desirable traits) biased - fossil record is __________ in what types of organisms are fossilized biomarkers - chemical signatures on the presence of life (DNA, amino acids, etc.)