Chromosome number (n) of potato (Solanum tuberosum)

What does “market-led extension” focus on, compared to traditional production-led extension?

The genetic purity of the seed is tested by:

In field experimentation, local control is a device to maintain

Yellow vein mosaic disease of okra is a viral disease. 

Which of the following insects spreads the disease?

Which one is insect trap crop?

An extreme modification in the order Diptera, where hind wings are reduced to nubs used for balance and direction during flight is

Anguina tritici causes:

What is the relationship between marginal cost (MC) and fixed cost (FC): 

The core component that allows an expert system in extension to function like a human expert is: