Is the rhythmic contractions of smooth muscle that pushes food through the intestines.

Draw the structure of dna nucleotide with adenine as nitrogenous base

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.

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?