As Darius is sleeping, his dog begins to bark. As a result, his brain emits several sudden sharp waveforms known as:

From the second week until the third month after conception, the developing organism is called a(n) __________

a. neonate b. fetus c. zygote d. embryo

__________ is prosocial behavior that is carried out without concern for one's own safety or self-interest

a. Altruism b. Cooperation c. Self-sacrifice d. Kindness