Answer: placer mining
Explanation: g.o.o.g.l.e is a very great thing
Phages are a positive use of viruses
Because then you get a infection
Answer: Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears. ... At the start of prophase I, the chromosomes have already duplicated. During prophase I, they coil and become shorter and thicker and visible under the light microscope.
