Which one of the following is one of the cahracteristics of a biological community?
Stratification
Natality
Mortality
Mortality
A.
Stratification
Stratification is the characteristic of the biological community. Stratification is the vertical layering or the phenomenon of having more than one stratum including formed by different plants/ organisms in the same place. A forest may have 5-7 state including large or canopy trees, medium trees, short trees, shrubs, herbs, ground flora etc. Stratification is useful as it can accommodate a large number of organisms of different types and more efficient use of resources. The animals that occupy such similar strata or ecological niches although geographically separated are called ecological equivalents
Which one of the following is not used in organic farming?
Glomus
Earthworm
Oscillatoria
Oscillatoria
The two gases making highest relative contribution to the green house gases are
CO2 and CH4
CH4 and NO2
CFCs and N2O
CFCs and N2O
Which one of the following symbols and its representation, used in human pedigree analysis is correct?
Stirred -tank bioreactors have been designed for
the addition of preservatives of the product
purification of the product
ensuring anaerobic conditions in the culture vessel
ensuring anaerobic conditions in the culture vessel
Which one of the following statemtents about morula in human is correct?
It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
It has far less cytoplasm as well as less DNA than in an uncleaved zygote
It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote
It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote
An imporved variety of trasgenic basmati rice
does not require chemical fertilisers and growth hormones
gives high yield nd is rich in vitamin-A
is completely resistant to all insect pests and diseases of paddy
is completely resistant to all insect pests and diseases of paddy
