The correct answer is b, phagocytosis and infection
Being hopeful and being positive
Quantitative research<span> is a formal, objective, systematic process in which numerical data are used to obtain information about the world. This </span>research<span>method is used: to describe variables; to examine relationships among variables; to determine cause-and-effect interactions between variables.</span>
Answer:
The baby starts breathing
Explanation:
While in the womb, a fetus has its oxygen delivered to it, and the waste products removed (all via the mother's bloodstream), so there is no reason to separate all the chambers of the heart while still in the womb.
However, once the baby is born and it is breathing, the chambers need to differentiate in order to allow the blood to reach the lungs, and the oxygenated blood and deoxygenated blood do not mix.
