The phases of human development are biologically defined. how, if at all, can they also be culturally defined?
what is the evolutionary relationship between vitamin d, folate, melanin, and sunshine? how does this affect fitness?

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.

The smallest parts of these that retain their original properties are called

Which example best describes a reflex action? a. eating food when hungry b. coughing when the throat is irritated c. bending down to lift a heavy object d. going for a walk outside