List from most polar to least polar

chlorophyll a
chlorophyll b
beta carotene
xanthophyll

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

How does the nervous system affect the excretory system?

The body of water found at number 4 on the map above is the