radiometric dating methods
Absolute dating is used to determine a precise age of a rock or fossil through radiometric dating methods. This uses radioactive minerals that occur in rocks and fossils almost like a geological clock. It's often much easier to date volcanic rocks than the fossils themselves or the sedimentary rocks they are found in.
I think the last one is correct.....
Answer:
Trace Fossil
Explanation:
Trace fossils are those details preserved in rocks that are indirect evidence of life. ... Trace fossils include burrows, track marks, coprolites (fossilized feces), stromatolites (fossilized algal mounds), and rhizoliths or rhizocretions (fossil remains of roots).
Answer:
option A " Polymerace chain reaction" (PCR)
Explanation:
polymerace chain reaction is a method in which millions to billions copies of DNA is formed by taking small about of DNA and amplify it for further studies.
It has following three steps:
1- Denaturation : in which un-winding of DNA occur by means of heat at approx 90 degree Celsius for some seconds
2- Annealing: is a step in which DNA priming occur.
3- Extension: complementary nucleotide is added.
