Question

use the figure below for questions 12 - 13. 12. what molecules are represented in #2? a. co₂ & o₂ b. h₂o & c₆h₁₂o₆ c. co₂ & h₂o d. o₂ & c₆h₁₂o₆ 13. what molecules are represented in #1? a. co₂ & o₂ b. h₂o & c₆h₁₂o₆ c. co₂ & h₂o d. o₂ & c₆h₁₂o₆ 14. where does cellular respiration occur in the cell? a. mitochondria b. chloroplast c. nucleus d. golgi 15. most of the oxygen gas present in the atmosphere is produced as a result of? a. osmosis b. cellular respiration c. photosynthesis d. decomposition photosynthesis can still occur if light is present. a. true b. false 17. no photosynthesis takes place in the petals of a flower. what explanation makes the above statement true? a. the statement is false because photosynthesis takes place only in the petals of a flower. b. photosynthesis takes place in the roots and the glucose is transported to the rest of the flower via the xylem. c. the statement is false, photosynthesis takes place in all plant cells. d. photosynthesis can only take place where there are chloroplasts in the green portion of a plant. 18. what is the green pigment responsible for absorbing light in photosynthesis? a. chloroform b. chloride c. chlorophyll d. cauliflower 19. what is the energy cells use to carry out different processes? a. fadh₂ b. atp c. adp d. nadh

Explanation:

Step1: Recall photosynthesis reactants

In photosynthesis, carbon - dioxide ($CO_2$) and water ($H_2O$) are used as reactants. For question 12, the molecules represented in #2 are $CO_2$ and $H_2O$. So the answer is C.

Step2: Recall photosynthesis products

The products of photosynthesis are oxygen ($O_2$) and glucose ($C_6H_{12}O_6$). For question 13, the molecules represented in #1 are $O_2$ and $C_6H_{12}O_6$. So the answer is D.

Step3: Recall cellular respiration location

Cellular respiration occurs in the mitochondria. For question 14, the answer is A.

Step4: Recall oxygen source in atmosphere

Most of the oxygen gas in the atmosphere is produced as a result of photosynthesis. For question 15, the answer is C.

Step5: Recall photosynthesis light - requirement

Photosynthesis requires light. So, the statement "Photosynthesis can still occur if light is not present" is false. For question 16, the answer is B.

Step6: Recall photosynthesis location in plants

Photosynthesis occurs in the green parts of plants where chloroplasts are present, not in petals which usually lack chloroplasts. So, the statement "No photosynthesis takes place in the petals of a flower" is true. For question 17, the answer is D.

Step7: Recall photosynthetic pigment

The green pigment responsible for absorbing light in photosynthesis is chlorophyll. For question 18, the answer is C.

Step8: Recall energy - carrier in cells

The energy cells use to carry out different processes is ATP. For question 19, the answer is B.

Answer:

1. C. $CO_2$ & $H_2O$
2. D. $O_2$ & $C_6H_{12}O_6$
3. A. Mitochondria
4. C. Photosynthesis
5. B. False
6. D. Photosynthesis can only take place where there are chloroplasts in the green portion of a plant.
7. C. Chlorophyll
8. B. ATP