Multiple Choice QuestionsPraying mentis is a good example of
Mullerian mimicry
Warning colouration
Social insects
Social insects
Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
Frequent irrigation of the crop
Treatment of the plants with cytokinins alongwith a small dose of nitrogenous fertilizer
Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5- trichlorophenoxy acetic acid
Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5- trichlorophenoxy acetic acid
Which one of the following amino acids was not found to be synthesized in Miller's experiment?
Glycine
Aspartic acid
Glutamic acid
Glutamic acid
Crop plants grown in monoculture are
low in yield
free from intraspecific competition
characterised by poor root system
characterised by poor root system
D.
characterised by poor root system
Monoculture involves the exclusive cultivation of a single crop over wide areas. It is an efficient way to use certain kinds of soils but the crop plants grown in monoculture are highly prone to pests and thus, it carries the risk of an entire crop being destroyed with the appearance of a single pest species or disease.
Montreal Protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year
1986
1987
1988
1988
Which one of the following is not used for construction of ecological pyramids?
Dry weight
Number of individuals
Rate of energy flow
Rate of energy flow
Niche overlap indicates
active cooperation between two species
two different parasites on the same host
sharing of one or more resources between the two species
sharing of one or more resources between the two species
Treatment of seed at low temperature under moist conditions to break its dormancy is called
scarification
vernalization
chelation
chelation
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