Sheryl is observing ovarian slides taken from a female ape. all the cells show crossover chromosomes. what is this stage?
meiotic prophase i
meiotic prophase ii
meiotic metaphase

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Taq polymerase is an enzyme isolated from the organism thermophilus aquaticus. this organism has been found living in the hot springs of yellowstone national park. this enzyme is used to copy human dna from crime scenes. most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme? view available hint(s)taq polymerase is an enzyme isolated from the organism thermophilus aquaticus. this organism has been found living in the hot springs of yellowstone national park. this enzyme is used to copy human dna from crime scenes. most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme? the enzyme will not work on human dna. nothing should be altered. the ph should be decreased. the temperature should be raised.

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer