Although the most frequent forms of down syndrome are caused by a random error, nondisjunction of chromosome 21, down syndrome occasionally runs in families. the cause of this form of familial down syndrome is

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

Discuss the functions of epithelial connective nerviud and muscular tissues

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.