I need help on this question from my science test.

Color blindness is a recessive trait. the gene for color blindness is on the x chromosome. the family tree below shows the trait of color blindness. the only unknown is the mother in the first generation

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism