1. C3 plants originate from cold temperate countries.
2. C3 plants are unable to adapt to high temperatures.
3. A temperature of 10-25 degrees Celsius is easy for them to survive.
4. Leaves of C3 plants do not have cranial anatomy.
5. They do not have a layer of mesophyll cells surrounding the leaf bundle sheath.
6. Calvin-Basham cycle occurs in the mesophyll cells of C3 plants.
7. Their CO2 emission rate is low.
8. C3 plants have lower rates of photosynthesis.
9. Their respiration and photorespiration occur more.
10. Their chloroplasts are structurally similar.
11. Their photosynthesis is best when atmospheric CO2 concentration is 50-150 ppm.
12. Stomata of C3 plants are open during the day and closed at night.
13. Most reactions in C3 plants are unidirectional.
14. They tend to waste water more and may not be adapted to dry areas.
15. Ribulose bisphosphate carboxylase enzyme activity is substantial in mesophyll cells of C3 plants.
16. Bundlesheath chloroplasts and mesephyll chloroplasts contain starch granules.
17. Rubisco enzyme activity occurs in both bundlesheath and mesophyll cells.
18. Carbon oxidation by C3 plants is inhibited when the atmosphere contains more than 20% O2.