Answer: Insect pests.
- A Fungal pathogens
- B Bacterial pathogens
- C Viral pathogens
- D Insect pests
Correct answer: D. Insect pests
Explanation: Pusa Gaurav (a Brassica) is an insect-pest-resistant variety developed to resist aphids, so it is breeding for insect resistance.
Different fish species occupy different feeding depths in the same pond without competing for food: Catla feeds near the surface, Rohu in the middle zone, and Mrigal or common carp at the bottom - letting a single pond support far more total fish than one species alone.
Concept context
Learn about animal husbandry, plant breeding, tissue culture, biofortification, and single cell protein.
Read the full Strategies for Enhancement in Food Production notes →