The process in late pregnancy when the fetal head begins to decend into pelvis.

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Witch theory suggests all living things are made up of cell or cells

Which of the following describes how binary fission and mitosis are similar? a)they are both used for growth or repair b)they both break down membrane-bound nuclei c)both invoke the replication of a single stand of dna d)both replicate genetic material