Biological control component is central to advanced agricultural production. Which of the following is used as a third generation pesticide?
Pathogens
Pheromones
Insect repellents
Insect hormone analogues
DDT is
A non-degradable pollutant
An antibiotic
A biodegradable pollutant
Not a pollutant
A free-living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is
tolypothrix
chlorella
nostoc
anabaena
Test-tube baby is one who
Is born out of artificial insemination
Has undergone development in a test tube
Is born out of the technique of fertilization in vitro
Has been developed without fertilization
Geometric representation of age structure is a characteristic of
Biotic community
Population
Landscape
Ecosystem
A biofertilizer is
A cyanobacterium like Anabaena sp. living in cavities of Azolla leaves
Symbiotic bacteria like Azotobacter which fix atmospheric nitrogen
Farm yard manure consisting of mixture of cattle dung and crop.
Green manure in which a quickly growing crop is cultivated and ploughes under
In India, human population is heavily weighed towards the younger age group as a result of
Short life span of many individuals and low birth rate
Long life span of many individuals and low birth rate
Short life span of many individuals and high birth rate
Long life span of many individuals and high birth rate
Amniocentesis is a process to
Determine any disease in heart
Determine any heredity disease in the embryo
Know about the disease of brain
All the above
Two opposite forces operate in the growth and development of every population. One of them is related to the ability to reproduce at a given rate. The force opposing to it is called
Biotic control
Mortality
Fecundity
Environmental resistance
Random genetic drift in a population probably results from
Constant low mutation rate
Large population size
Highly genetically variable individuals
Interbreeding within this population
