Angelman Syndrome or Prader Willi will be present in a child when:

a) there is a deletion on the X chromosome.

b) there is a mutation involving the X chromosome.

c)methylation has occurred involving one parent's chromosome.

d)methylation has occurred involving both parents' matching chromosomes.

Most of earth’s fresh water is found in oceans and seas stored in glaciers and ice caps groundwater stored beneath the surface found in lakes, rivers, streams, and reservoirs

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

What does natural resource management aim at ?