Pulmonary veins: A) split off the pulmonary trunk
B) transport oxygenated blood to the lungs
C) return blood to the right atrium of the heart
D) transport oxygenated blood to the heart

Competition occurs between species when

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

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