Question

Concerning carbohydrates that form from photosynthesis: they all contain C, O, H, N they all contain C, O, N they all contain C, O, H the ratio of H to C is fixed at 2:1 the ratio of C to O is fixed at 2:1 none of the ratios of the elements are fixed

Answer 1

Answer: h/O elements are not fixed.

Explanation: in this question :-

h/C = C/O

In the above expression the element C is cancelled out and only 'h' and 'o' is left. Therefore

H/O is the only ratio elements which ratio are not fixed .

Answer 2

1. They all contain C, O, H

2. The ratio of H to C is fixed at 2:1

Explanation:

• Carbohydrates are the molecules which contain C,H and O  and hydrates or water molecules in their structure.
• The Carbohydrate product formed from photosynthesis process is known as sucrose molecule which is a diasaccharide.
• The sucrose is converted into glucose which is a monosaccharide and the glucose is stored in the form of a starch.
• All these carbohydrate forms are made of C, H and O in 1:2:1 ratio.
• Thus, the selected options are correct.

To learn more:

Carbohydrates: https://brainly.in/question/13345668