Which component of weather describes the weight of the atmosphere pressing down on Earth? A) Air pressure
B) Air temperature
C) Precipitation
D) Wind direction

2polnis which of the following is an advantage of an in vitro experiment?me

What process creates gametes? a.fertilization b.mitosis c.meiosis

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.