As a rule, which of the following is/are destroyed by the impact of the pollen tube and the others remain intact until some time afterward?
A. Only one synergid
B. Both synergids
C. Only one antipodal cell
D. The whole egg apparatus
Answer: Option A
A. Only one synergid
B. Both synergids
C. Only one antipodal cell
D. The whole egg apparatus
Answer: Option A
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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