Please help me with these two tasks..

Many organs are involved in the processes of keeping the blood and the body clean. when poisonous or harmful substances are in the blood, they are absorbed by the and released in a less harmful form. when wastes are present in the blood, they are filtered out and removed from the body by the

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

The sea slug that considered to be a photosyntheesizing animal