Wild plants have the following characters
thorns are present
they can thrive in water logged soils
they are resistant to drought conditions
all the above
Pearl is made up of
Calcium carbonate
magnesium carbonate
calcium silicate
sodium carbonate
Rearing of silkworms is called
Sericulture
Apiculture
Olericulture
Horticulture
Poultry birds grown specially for meat are
layers
broilers
turkeys
none of the above
Fossil fuels are
coal
petroleum
both a and b
none of these
The animals with shells are
Molluscs
Echinodermates
Both a and b
None of these
One of the ancient method of crop improvement is
mass selection
pedigree method
hybridisation
The most common technique used for improving crops is
watering
deweeding
ploughing
Pure breed is obtained in this selection
clonal selection
Pheromones are useful for
Digestion
Respiration
Flying
Reproduction
