Answer:
D. they do not have stems, roots and leaves
Explanation:
I'm not too sure but I would find the molar mass of nitrogen dioxide and then divide.
N - 14.01
O - 16.00
(14.01) + 2(16.00)
14 01 + 32.00 = 46.01
14.01 / 46.01 = 0.3044....
30.4%
32 / 46.01 = 0.6955....
69.6%
Stomach,liver,small intestines and large intestines
Carbon is the main atom used in the formation of molecules that build cells using the DNA based reproduction system. The carbon atom have affinity to bond to other atoms, and is widely available in Nature and is a stable atom.
Carbon forms four bonds in a tetrahedral arrangement around the carbon. This allows a carbon to bond to carbon or other elements with a great variety of shapes. 99% of the mass of a living organism, such as a human, is made up of just six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus with carbon making up the linking element between all others.
Carbon can from a chain that is linear or branched or form ring structures as well as bonding with other functional groups containing other elements from the periodic table.
