What is Luca?
Pls explain!

Last Universal Common Ancestor

The acronym LUCA stands for—Last Universal Common Ancestor. The term is used by astrobiologists and those interested in the evolutionary biology. The geological period of time in which LUCA existed was a point of demarcation from primitive life forms to more-advanced earth-living entities.

#google

If you want to know what Luca is or stands for it stands for last universal common ancestor.

Explanation:

My explanation to this is that it is the most recent population of organisms from which all organisms now living on Earth have a common descent, the most recent common ancestor of all current life on Earth.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

answer: c.

explanation: