A. The photosynthetic rate of both C3 and C4 plants will be greatly enhanced B.

Question

A. The photosynthetic rate of both C3 and C4 plants will be greatly enhanced

B. The photosynthetic rate of C3 plants will be greatly enhanced, but the photosynthetic rate of C4 plants will be mostly unaffected

C. The photosynthetic rate of C4 plants will be greatly enhanced, but the photosynthetic rate of C3 plants will be mostly unaffected

D. The photosynthetic rate of both C3 and C4 plants will be mostly unaffected.

Normal atmospheric conditions are 20% O2, 390 ppm CO2 (0.0390%). C3 plants grown under which of the following conditions will show the greatest amount of photorespiration?

A.) 30% O2, 190 ppm CO2

B.) 20% O2, 390 ppm CO2

C.) 10% O2, 390 ppm CO2

D.) 20% O2, 700 ppm CO2

Please explain step by step anyswer, I do not totally understand this concept or how to find the answer

10% O2, 700 ppm CO2

i Chrome File Edit View History Bookmarks People Window Help 10% D- Sat 5:24 PM E ? G Secure l https://uic.blackboard.com/bbcswebdav/pid-5956876-dt-content-rid-62035784-2/courses/2018.summer.bios.100.13990/e02m17.pdf e02m17.pdf 21 7 6. Plants grown under which colors of light would demonstrate the greatest photosynthetic O2 production rate? A. Red & Yellow B. Green & Yellow C. Green & Blue D. Red & Blue 7. Doubling the ambient CO2 concentration from 400 ppm to 800 ppm will have the following effects on C3 and C4 plants A. The photosynthetic rate of both C3 and C4 plants will be greatly enhanced B. The photosynthetic rate of C3 plants will be greatly enhanced, but the photosynthetic rate of C4 plants will be mostly unaffected rate of C3 plants will be mostly unaffected Also, don't get hung up on the word most?y, OK? This isn 't a trick question.. C. The photosynthetic rate of C4 plants will be greatly enhanced, but the photosynthetic D. The photosynthetic rate of both C3 and C4 plants will be mostly unaffected. 8. You measure the photorespiration rate of a C3 plant and a C4 plant under the current atmospheric o, concentration (20%). You then increase the atmospheric concentration of 02 to 30%. How will the photorespiration rates of the C3 and C4 plants be affected by this change? A. The photorespiration rates will increase greatly in both the C3 and C4 plants B. The photorespira tion rate will increasc grcatly in the C3 plant but only slightly in the C4 plant C. The photorespiration rate will increase greatly in the C4 plant but only slightly in the C3 plant D. The photorespiration rates will increase only slightly in both the C3 and C4 plants 21

Explanation / Answer

Answer 6-

The 4th option is correct. Red and Blue lights help plants to grow in height. Therefore, these colors help plants to get highest rate of photosynthesis.

Answer 7-

At reaching almost 400 ppm CO2 level, C4 plants reach to threshold level of their photosynthetic rate. However, the C3 plants have tendency to increase their photosynthetic rate. They still achieve higher photosynthetic rate even at 800ppm.

Therefore, the 2nd option (B) is correct.

Answer 8-

The second option is correct. C4 plants are insensitive to O2 concentration. These plants can store higher CO2 in their bundle sheath. C3 plants however will achieve higher respiration rate.

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