Which of the following blocks the "Hill reaction" in photosynthesis thus killing the plant by closing down food production?
A. Carbon dioxide (CO2)
B. Ozone (O3)
C. Chloroflurocarbon (CFC)
D. Peroxyacetyl nitrate (PAN)
Answer: Option D
Related Questions on Plant Anatomy and Physiology
A. Cinnamomum - Amoora association
B. Bischofia - Dillenia association
C. Shorea - Lagerstroemia association
D. Mesua - Michelia association
Which of the following react with haemoglobin, forming methemoglobin which will not take up oxygen?
A. Nitrates
B. Nitrites
C. Carbides
D. Oxides
Internally, hydathode shows a group of loosely arranged parenchymatous cells called as
A. Epiderm
B. Epithelium
C. Ampithecium
D. Epithem

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