Why is 'learning by doing'

Select the most appropriate word for the given group of words.

Branch of science that studies structure, classification and genetics of plants

Select the most appropriate synonym of the given word.

SUBSEQUENT

Select the most appropriate meaning of the given idiom. 

One track mind

Dealers cannot __________ profit due to increase in excise duty, and they should not be ___________ with loss due to reduction.

He got a job in the Railways through the back door.

Select the most appropriate option the can substitute  the bold segment in the given sentence.

The importers had ___________ that the IGST was being ____________ on them twice on the very same transaction by segregating portions of it.

Select the most appropriate word for the given group of words.

a slowly moving mass or river of ice

Select the most appropriate antonym of the given word.

EXACERBATE