When is the lac operon most active? a: when glucose levels are high and lactose is present . b: when glucose levels are low and lactose is absent . c: when glucose levels are low and lactose is present . d: when glucose levels are high and lactose is absent?

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time