Which timeline best shows the history of the development of cell theory? 1065 Virchow 1838 Schleiden 1855 Hooke 1COO 1700 1800 1000 1070 Schwann 1830 Leeuwenhoek 1005 Hooke 1838 Schleiden 1855 Virchow O 1000 1700 1800 1900 1070 Leeuwenhoek 1839 Schwann 1665 Hooke 1838 Leeuwenhoek 1855 Virchow 1600 1900 1700 1876 Schleiden 1830 Schwann 1665 Virchow 1838 Schwann 1855 Hooke 1600 1700 1800 1300 1076 Leeuwenhoek 1839 Schleiden

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -