Worms are invertebrates. There are actually several phyla of worms. They can live in a range of diverse environments. Some worms live in water, others on land, and some are parasites that live in the digestive systems of other animals! All worms lack legs. Flatworms are the simplest type of worm and have few organs, a head and a tail. Roundworms are slightly more complex than flatworms. They have simple digestive and nervous systems. Segmented worms are the most complex and include earthworms and fireworms. They have circulatory, nervous and digestive systems. Ragworms are a species of segmented worm. Ragworms (what?)

a. only live on land.
b. have a backbone.
c. lack digestive systems.
d. have circulatory systems.

John and jane jones’ newborn baby girl, leah, has just been diagnosed with galactosemia. prior to their genetic counseling appointment, they submitted this family history: john and jane’s older child, a son named lee, does not have galactosemia. john is the only child of hanna and harry. harry was an only child. hanna has two older sisters, hope (the oldest) and holly. both harry and hanna’s parents lived in good health into their 80s. jane’s brother, joe, is married to jen. they have a son, les, who is a healthy nine-year-old with myopia (nearsightedness) but no sign of galactosemia. jane’s mother, hilda, is alive and healthy; jane’s father, henry, passed away last year of a sudden heart attack. hilda and henry have no family history of galactosemia. use the information in the family history to construct a pedigree for this family.