A high biological oxygen demand (BOD) indicates
A. Intense level of oxygen concentration
B. Intense level of hydrogen concentration
C. Intense level of microbial pollution
D. Intense level of ozone depletion
Answer: Option C
A. Intense level of oxygen concentration
B. Intense level of hydrogen concentration
C. Intense level of microbial pollution
D. Intense level of ozone depletion
Answer: Option C
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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