Please help me get the answers for where it says answer here

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

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

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels