During the period when H. orientalis is photosynthesising at a fast rate, substances are transported through the plant in the phloem from sources to sinks.
(i) Name two substances that are translocated from a source to a sink.

ability to bond woth oxygen

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.

is this for the e2020 class

i got you i did it ya know what it is just needing to fill this in for a quick task!