Investigation of limiting factors — Biology 9700 AS & A Level Question & Worked Solution

(a(i))[3]

Explain why this is carried out.

(a(ii))[1]

Suggest one disadvantage of producing seed in this manner.

(b(i))[3]

Suggest why photorespiration is most likely to occur in hot, dry conditions.

(b(ii))[4]

Explain how the leaf anatomy of a maize plant reduces photorespiration, even in hot, dry conditions.

(c(i))[2]

Suggest an explanation for the lack of effect of carbon dioxide concentration on the rate of photosynthesis in maize plants, shown by these results.

(c(ii))[2]

Suggest one explanation for the changes in the rate of photosynthesis between 0700 hours and 1900 hours on day 1.

(i)[2]

Suggest an explanation for the lack of effect of carbon dioxide concentration on the rate of photosynthesis in maize plants, shown by these results.

(ii)[2]

Suggest one explanation for the changes in the rate of photosynthesis between 0700 hours and 1900 hours on day 1.

Investigation of limiting factors — practice question