University:
California State University, Northridge
Course:
BIOL 101 | General Biology
Academic year:

2023
Views:

13

Pages:

2
Author:

Mahmoud M.

Biology notes - Evolutionary Biology Like evolution, it does not mean that change was brought about by Tay. Evolutionary trends show the power of selection. The evolutionary tree contains many branches, some groups' lineage is usually. Evolution is not a linear process The rate of speciation may be constant or it may jump According to the cascading model New species develop from a combination of mutations caused by natural selection in the fossil record Observations species have changed more than they have arisen from ancestral species, and then it changed relatively little over a long period of time. Result of random selection? Phylogenetic Trees of Life Bacteria Archaea Eukaryotes A circular or three-dimensional tree of life may represent time seen, but we still need to be careful in drawing conclusions from the table. Honey Furnace; Geological Fold This is the northern part of Mount Everest. ... Do you see the yellow lines? This material comes from seawater and is currently at an altitude of over 25,000 feet How did marine sediment reach such heights on Mount Everest? Sediments formed under the ocean millions of years ago. Earth is geologically active and land masses are in motion. St Mount Helens Before and after the 1980 eruption Small cones grow again in the middle of the separated crater Observing the workings of the earth today tells us about conditions and processes in the past. Fossils and Geological Record Shows how organisms evolved in historical order This is the entrance to Third Creek near Ag Campus... Did you see anything in the river? Sediments drawn by water due to rain. Erosion, faulting, and thrust can change the geological order... Some elements exist in several isotopes – Some isotopes are unstable and decay at a constant rate.