Disease and insect resistance is governed by________________?

Related Mcqs:

1. In wheat, example of durable insect resistance includes resistance to___________________?

   A. Green bugs
   B. Stem saw fly
   C. Hessian fly
   D. All the above

2. Chemicals, used for controlling the disease of crops, fruits & vegetables is___________ & chemical prepared for controlling insect-pests ——————-:

   A. Insecticides—Herbicides
   B. Fungicides—Insecticides
   C. Weedicides—insecticides
   D. None of the above

   Submitted by: Shafiq Rehman

3. The term vertical resistance and horizontal resistance were first used by________________________?

   A. Van der plank (1963)
   B. Karpechenko (1927)
   C. Hull (1945)
   D. Correns (1900)

4. Which one is most dangerous insect of cotton crop?

   A. Spotted holl worm
   B. Jassids
   C. Both a & b
   D. Pink ball worm

   Submitted by: Shafiq Rehman

5. Mutation was first discovered by________________?

   A. deVries (1900)
   B. Morgan (1910)
   C. Stadler (1928)
   D. Wright (1791)

6. A nullisomic individual is represented by________________?

   A. 2n-1
   B. 2n+1
   C. 2n-2
   D. 2n+2

7. The term mitosis was coined by________________?

   A. Flemming (1882)
   B. De Vries and correns (1908)
   C. Bruce and Keeble (1908)
   D. Non of these

8. The term self incompatibility was coined by________________?

   A. Koelreuter (1763)
   B. Gerstel (1950)
   C. East (1940)
   D. None of the above

9. Convergent improvement was proposed by________________?

   A. Jones (1920)
   B. Richy (1920)
   C. Hays (1919)
   D. East (1920)

10. Plants can be made disease resistant by___________________?

    A. Colchicines treatment
    B. Heat treatment
    C. Breeding with the wild variety
    D. Hormone spray