"when the maternal immune system becomes sensitized against antigens expressed by the fetus, what type of immune reaction occurs? "

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

Arrange the following in the correct sequence, from earliest to most recent, in which these plant traits originated. 1. sporophyte dominance, gametophyte independence 2. sporophyte dominance, gametophyte dependence 3. gametophyte dominance, sporophyte dependence a) 1 → 2 → 3 b) 2 → 3 → 1 c) 2 → 1 → 3 d) 3 → 2 → 1 e) 3 → 1 → 2

The pronunciation aid that determines the stress placed upon a syllable is the