The answer is E because heart is circulatory and brain is part of your nervous system.
Water molecules are polar, having partially positive and partially negative ends.
trust me..
idk how to explain
The answer is C. The dominant trait will be present in all cells in a Punnet Square, meaning the dominant trait will be shown in the entire F1 generation, but if an offspring from the F1 generation mates with a parent with only recessive traits (aa), it will create one offspring in the F2 generation that will have the recessive trait showing. Ex: F1: Aa - other parent: aa.
Decomposition, because the food and leaves are being decomposed while being broken down.