Rhonda Moore Bio/ Lecture 1101 D957 October 2, 2016
Radioactive Dating
A) Any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of long-lived radioactive element plus its decay product.
Example:
B) Look at the diagram below which represents the radioactive decay of uranium- 238. The shaded area represents the decay product which is lead-206. The half life of uranium-238 is 4.5 billion years, since this object has gone through two-half lives it is 9 billion years old.
C) If you could dig up a rock that was buried over decades ago, you can determine how old the human body or rock has been around. By evaluating through radioactive dating; you can determine the …show more content…
Vestigial Structures A) A structure in a organism that has lost all or most of its original functions in the course of evolution, such as human appendix. B) For example the picture above clearly shows you the examples of Vestigial Structures are included in the human appendix, the pelvic bone of a snake, and wings of flightless birds.
C) The evolution of the Vestigial Structures is homologous to structures that are functioning normally in other species. Therefore they are considered evidence for evolution, which can be beneficial heritable traits, will arise in population over a period of time.
Comparisons of Molecules (especially DNA) from different organisms- A) DNA is used to define comparison and identification of organisms. The comparison of DNA base sequences is used to elucidate relationship between organisms. DNA is a complex organisms to their offspring during the reproduction
Radioactive Dating
A) Any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of long-lived radioactive element plus its decay product.
Example:
B) Look at the diagram below which represents the radioactive decay of uranium- 238. The shaded area represents the decay product which is lead-206. The half life of uranium-238 is 4.5 billion years, since this object has gone through two-half lives it is 9 billion years old.
C) If you could dig up a rock that was buried over decades ago, you can determine how old the human body or rock has been around. By evaluating through radioactive dating; you can determine the …show more content…
Vestigial Structures A) A structure in a organism that has lost all or most of its original functions in the course of evolution, such as human appendix. B) For example the picture above clearly shows you the examples of Vestigial Structures are included in the human appendix, the pelvic bone of a snake, and wings of flightless birds.
C) The evolution of the Vestigial Structures is homologous to structures that are functioning normally in other species. Therefore they are considered evidence for evolution, which can be beneficial heritable traits, will arise in population over a period of time.
Comparisons of Molecules (especially DNA) from different organisms- A) DNA is used to define comparison and identification of organisms. The comparison of DNA base sequences is used to elucidate relationship between organisms. DNA is a complex organisms to their offspring during the reproduction