botany help?

[Lindsey]

sorry, but two more questions

1. Most of the dry weight of a plant is the result of
a. water/minerals through root hairs
b. water/minerals through mycorrihizae
c. CO2 through stomata in leaves
d. CO2 and O2 through stomata in leaves

2. The bulk of a plant's dry weight is derived from
b. CO2
c. the hydrogen from H2O
d. the oxygen from H2O
e. uptake of organic nutrients from the soil


again, just the answer would suffice,
but if you could, an explanation would be a great help

(if you're wondering why answers are missing
i excluded the answer I already got wrong)

[science teacher]

1. Most of the weight of the plant is from the water taken in by the roothairs.
2, The dry weight of the plant is from the minerals from the soil. The CO2 taken in through the stomata is made into the sugars and cellulose. That is a possible answer.