<u>Answer</u>: c. a and b
Trees play vital roles in the production of oxygen as well as the fixation of carbon from 
. As trees use nitrogen, phosphorus and water as nutrients for growth, their diminishing numbers would change the balance between these three elements significantly.
Thus, during rains, the water level will rise much faster and higher in the absence of trees. These could possibly lead to increasing cases of devastating landslides.
The sugar and phosphate portion of the nucleotides are found as segments of the rails on the DNA twisted ladder.
Cellular respiration produces carbon and it’s a long process involved with the mitochondria, pretty much cellular respiration puts carbon into the air from plants.
When photosynthesis is how plants grow, by taking the sun as a energy source instead of consuming other things for energy
Make sense?
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epithelial stomach cell>stomach lining tissue>stomach>disgestive system
