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
D.
Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5- trichlorophenoxy acetic acid
If a pulse crop possesses premature yellowing of leaves and decrease in yield and application of magnesium and iron to promote synthesis of chlorophyll may become most beneficial to overcome the problem and to obtain maximum seed yield.
Magnesium is an important part of ring structure of chlorophyll molecule and its deficiency causes chlorosis and premature leaf abscission.
In iron deficiency also, the leaves become chlorotic because iron is required for the synthesis of some of the chlorophyll protein complexes in the chloroplast.
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
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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