Male cone of Pinus possesses :
The male cone of Pinus has a central axis and a number of spirally arranged mirosporophylls. Each microsporophylls bears two oblong microsporangia abaxially on the proximal part.
C4 plants, synthesis of sugars/final CO2 fixation occurs in:
undifferentiated mesophyll cells
bundle sheath cells
Cook cambium and vascular cambium are :
parts of secondary xylem and phloem
parts of pericycle
First natural cytokinin was discovered by :
Skoog and Miller
Benson and Calvin
Thimann and Went
Major role of minor elements inside living organisms is to act as :
binder of cell structure
constituent of hormone
building blocks of important amino acids
cofactor of enzymes
Which of the following is not vestigial in man ?
A eukaryotic gene contains two kinds of base sequences. Which of these plays an important role in protein synthesis?
Both 'a' and 'b'
None of the above
The number of hydrogen bonds between adenine and thymine in a DNA molecule is :