By which constitutional amendment minimum age to vote

Which of the following combination is incorrect?

Which are true examples of formal garden?

Azolla can fix kg N2/halyear. 

Agrobacterium is widely used for gene transfer because

The project 'Clean Street Food' is an initiative taken up under a 360° approach to:

Central inland fisheries research institute was establishment in?

What are tyloses, and what is their role in plant defense against pathogens?

Which chromosome model was proposed by Du Praw on the basis of observation made on Human Chromosome?

Heterosis results from the masking of harmful effects of recessive alleles by their dominant alleles