Why was Spallanzani's first experiment with spontaneous generation of microbes challenged?

Is citizens were comfortable with their detachment from england and had no interest in going to war

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled