The juvenile hormone in insects is secreted by which organ?

For Magnesium deficiency determination, plant that is used as indicator  plant _________________________ .

Which of the following crop is used for flax and oil both?

Study of communities is known as 

The land use system involving trees combined with crops and/or animals is called

The principal photosynthetic pigment in blue-green algae is

Water level recording is done by

"Golden Rice" refers to the rice rich in:

The first transgenic crop approved for cultivation was

Enzyme that fixes CO₂  in C4 plants at Iow concentrations?