To analyze the long bones, the femur and the humerus, you looked at bone markings such as condyles, tuberosities and trochanters. look back at the photographs and at the bone markings on your maniken®. how would you describe these markings in your own words? which features do you think separate each class of markings from the others?

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.