Which of the following is an example of microevolution? a caterpillar changes form into a butterfly. a population of birds with red feathers slowly changes to having blue feathers. a dinosaur species evolves over time into a bird species. a black cat has kittens with white spots.

A population of birds with red feathers slowly changes to having blue feathers.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.