How many alleles are there for the four main types of human blood?
Please answer fast

In general, how long does it take to accomplish a long-term goal? a.a few days to a weekb.a few weeks to a monthc.a few months to a yeard. more than a year

Why do oceanic plates tend to subduction when colliding with a continental plate

Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative