Science bio 101 Crossword
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
                                              
 
 
Down: 2) (rock layering) the formation of sedimentary rocks4) Gymnosperms dominant the land plants, origin of the angiosperms, origin of the mammals5) Chronology of earth’s history6) Quantifiable, heritable characteristics or trait7) Speciation model in which different selection pressures lead to divergences within a single population.8) burst of genetic divergences from a lineage gives rise to many new species10) Method of determining evolutionary relationships by grouping species into clades based on shared characters12) Evolutionary tree that shows a network of evolutionary relationships among clades.15) Evolutionary pattern in which a lineage persists with little or no change over evolutionary time.16) : indirect evidence of past life such as tracks and borrows.17) Method of estimating the age of a rock or fossil by measuring the content and proportions of a radioisotope and its daughter elements18) The joint evolution of two closely interacting species; each species is a selective agent for traits of the other.20) origins of life21) Supercontinent that formed about 237 million years ago and broke up about 152 million years ago.24) origins of moderns’ humans Across: 1) The two lineages that emerge from a node on a cladogram.3) origin of the vascular plants, origin of the reptiles, origin of the amphibians, origin of the eukaryotic cells9) the process by which minerals replace bones and hardened tissues11) Evolutionary history of a species or group of species13) A species or group of species that share a set of characters14) Theory that earth’s outer layer of rock is cracked into plates, the slow movement of which rafts continents to new locations over geologic time.19) A versatile series of fossils that serves as a record of past life.22) Pattern in which speciation occurs in the absence of physical barrier23) Adaptation of an existing structure for completely different purpose; a major evolutionary novelty.25) Speciation pattern in which a physical barrier that separates members of a population ends flow between them26) Characteristic time it takes for half a quantity of a radioisotope to decay.27) Supercontinent that existed before pangea, more 500 million years ago28) Refers to species that has been permanently lost.29) An ancestor and all of it’s descendants30) An evolutionary adaptation that gives its bearer the opportunity to exploit a particular environment more efficiently or in a new way.
 

 

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