What simple molecule reacts with itself to form a disaccharide?

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.

Speed is the ratio of the distance of an object moves to

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.