In the given figure, B and C are the centres of the two circles. ADE is the common tangent to the two circles. If the ratio of the radius of both the circles is 3 : 5 and AC = 40, then what is the value of   DE ?

What is the limit of Total Polar Compounds (TPC) in Used cooking Oil?

Light reaction resulting in the production of ATP and NADPH takes place in 

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Which one of the following element is not essential for plant growth is:

.……………………………….instrument is used to measure the wind velocity.

The important event in the early history of agriculture started in 4400 BC

A. Domestication of sheep

Budding is most commonly done when there is

Test cross ratio for the monohybrid is

Which of the following frequently used as thickening agents

Protein content in lentils is