Two species of birds feed on berries. the birds are active at different times of the day, and do not come into contact with one another. nonetheless, the presence of one species limits the survival and reproduction of the other. what type of competition is this

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.