Which of the following are used by scientist to classify organisms behavior
color
physical characteristics
DNA
embryo development

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Which anatomical plane is the only one that could not show both the sternal region and vertebral region

Which strand is synthesized towards the replication fork