Questions

Improve the bracketed part of the sentence.
Scientists (have developed) an “organ-on-a-chip” platform to study how drugs are transported across the human placental barrier.

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
Excessive desire to work

In the following question, out of the given four alternatives, select the one which is opposite in meaning of the given word.

Obscene

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
One who has suddenly gained new wealth, power or prestige

At low temperature, Lead behaves as a :

Who was the Emperor of Russia during Russia revolution ?

While running DOS on a PC, which command would be used to duplicate the entire diskette?

What substance gives plants their green color?