As mass increases the radius of the ion's path
1) increases
2) decrease

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

the answer you are looking for is d. there are no holes for blood to enter or leave the system. your welcome