What are free dna nucleotides needed for in pcr?

Free nucleotides are required in the PCR for the elongation for the new DNA strand during replication by the polymerase. Remember that during DNA replication, a primer is recruited at the initiation site then DNA polymerase enzyme elongates the primer by adding nucleotides (dNTPs) at the 3’ end of the primer and catalyzing a phosphodiester bond.    

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully