Questions

A, B and C can complete a work in 20, 24 and 30 days respectively. All three of them starts together but after 4 days A leaves the job and B left the job 6days before the work was completed. C completed the remaining work alone. In how many days was the total work completed?

The 'Kyoto Protocol' is an international treaty that commits State parties to reduction in

________ means that the President of India can refer any matter that is of public importance or that which involves interpretation of Constitution to Supreme Court for advice.

Improve the bracketed part of the sentence.
The communities of ants are sometimes very large, (numbered) even upto 500 individuals: and it is a lesson to us that no one has ever yet seen quarrel between
any two ants belonging to the same community.

Intestinal bacteria synthesizes which of the following in the human body?

___ has naked seeds.

Which enzyme has been used by scientists of Massachusetts Institute of Technology to induce plants to give off dim light?

Air ___________________ are the substances which contaminate the air.