Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900°C (assuming molar mass and atomic radii of iron remains constant with temperature) is
|
Answer
|
Which one is a wrong statement?
|
Answer
|
Double fertilization is
|
Answer
|
What is the role of $NAD^{+}$ in cellular respiration?
|
Answer
|
In which of the following forms is iron absorbed by plants?
|
Answer
|
Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
|
Answer
|
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
|
Answer
|
Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
|
Answer
|
Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
|
Answer
|
In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
|
Answer
|