If a wax-like substance closes the stomata on plant leaves, what will be the first effect on photosynthesis?
Answer and explanation
Correct answer: Entry of carbon dioxide will decrease
The governing concept is that stomata are microscopic pores that permit gas exchange between a leaf and the atmosphere. Carbon dioxide, a raw material for photosynthesis, normally enters through these pores. If a wax-like coating closes them, carbon-dioxide entry decreases first, so the photosynthetic rate may subsequently fall. Option A is correct; oxygen production would not immediately rise, root water uptake does not stop at once, and chlorophyll cannot turn into blood.
Frequently asked questions
What is the correct answer to this question?
Entry of carbon dioxide will decrease
Why is this the correct answer?
The governing concept is that stomata are microscopic pores that permit gas exchange between a leaf and the atmosphere. Carbon dioxide, a raw material for photosynthesis, normally enters through these pores. If a wax-like coating closes them, carbon-dioxide entry decreases first, so the photosynthetic rate may subsequently fall. Option A is correct; oxygen production would not immediately rise, root water uptake does not stop at once, and chlorophyll cannot turn into blood.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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