Question

1. which of the following statements is accurate in describing the movement of carbon during photosynthesis?

the movement of carbon during photosynthesis starts in the form of carbon dioxide and will end up in the form of oxygen.
the movement of carbon during photosynthesis starts in the form of carbon dioxide and will end up in the form of glucose/sugar.
the movement of carbon during photosynthesis starts in the form of glucose/sugar and will end up in the form of carbon dioxide.
the movement of carbon during photosynthesis starts in the form of water and will end up in the form of glucose/sugar.

1. refer to figures 1 & 2. when chlorophyll is absent in leaves, the leaves are unable to produce what two things?

sugar and carbon dioxide
sugar and oxygen
oxygen and carbon dioxide
carbon dioxide and water

1. refer to figure 3. which of the following statements correctly compares leaves on trees in the month of october and may?

in october there is a decrease in chlorophyll in the leaves, which means the leaves are redder and are absorbing more sunlight energy than they were in may.
in october there is an increase in chlorophyll in the leaves, which means the leaves are greener and are absorbing less sunlight energy than they were in may.
in october there is a decrease in chlorophyll in the leaves, which means the leaves are redder and are absorbing less sunlight energy than they were in may.
in october there is a decrease in chlorophyll in the leaves, which means the leaves are greener and are absorbing more sunlight energy than they were in may.

1. refer to figure 3. which of the following correctly orders months from the one with the lowest matter and energy flow to the one with the highest?

january > may > august > july
may > march > november > september
april > july > october > november
december > may > july > april

Explanation:

Question 1

Photosynthesis uses carbon dioxide ($\ce{CO_2}$) and water to produce glucose ($\ce{C6H12O6}$) and oxygen ($\ce{O2}$). The carbon from $\ce{CO_2}$ is incorporated into glucose. So the correct statement is the one where carbon starts as $\ce{CO_2}$ and ends as glucose/sugar.

Chlorophyll is essential for photosynthesis. Photosynthesis produces glucose (sugar) and oxygen. Without chlorophyll, photosynthesis can't occur, so the leaves can't produce sugar and oxygen.

In October, trees lose chlorophyll (so leaves turn redder as other pigments show). Less chlorophyll means less ability to absorb sunlight energy compared to May (when chlorophyll is high, leaves are green and absorb more sunlight). So the correct statement is about decreased chlorophyll, redder leaves, and less sunlight absorption than May.

Answer:

The movement of carbon during photosynthesis starts in the form of carbon dioxide and will end up in the form of glucose/sugar.

Question 2