7. Which structure of the plant is responsible for transport?
a. Flower
b. Leaf
c. Stem
d. Root

Both the stem and the roots play a part in transportation

 c. Stem

Explanation: Though leaves and roots participate in the transportation of waters and nutrients, several components of the stem carry out the bulk of transportation.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.