ā Mizoram Horticulture Service
Past Questions ā 2017
Dodder or Cuscutta spp., broomrape or Orobanche spp. and witchweed or Striga spp. falls under the ______ weeds
A)
Aquatic
B)
Parasitic
C)
Herbaceous
D)
Grassland
Cuscuta, Orobanche and Striga are parasitic weeds.
In plant tissue culture, virus free plantlets are developed from
A)
Vascular tissues
B)
Root hairs
C)
Apical meristem
D)
All of these
Shoot/apical meristem cultures are used because meristems often lack virus populations.
The factors leading to introduction of several weed species in India include
A)
Development of livestock industry
B)
Long distance travel by birds
C)
Import of food grains and agricultural seeds
D)
All of these
Livestock movement, birds, and imported seed/food grains can all introduce weeds.
The common name for Nā-3,4-dichlorophenyl āN,Nā-dimethylurea which is primarily a soil active herbicide to control annual grasses, is
A)
Bromacil
B)
Fluometuron
C)
Diuron
D)
Isoproturon
Diuron is the 3-(3,4-dichlorophenyl)-1,1-dimethylurea herbicide used mainly for annual weed control.
What will be the average of the following set of scores? 59, 87, 67, 101, 63, 59, 61
A)
62
B)
71
C)
75
D)
52
The total is 497; 497/7 = 71.
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