The heart is an example of which level of organization within an organism?
cell
organ
tissue
organ system

What is the chance of two parents with blood types ab and o producing an offspring with blood type o a.0% b.25% c.75% d.50%

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

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