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signify the term - opercular gillthe gill found in bony fish operculum is the outer covering of the gill when its drawn away from the body it pulls
what do you understand by open circulatory systema circulatory system in which circulating fluid blood flows into vessels or tubes not connected to
determine by nutritive muscular cellthe cells which form the gastrodermis lining the inner cavity of cnidarians they carry out two functions first is
what is the role of naupliar eyethe unique eye found in larval stage of the crustacean life cycle this single compound eye is located medially and
describe in detail - nacreous layerthe innermost of the three layers of a mollusc shell it is also referred to as mother-of-pearl it comprises thin
what is molting explain in briefthe periodic shedding of outer body covering of an animal the term is applied to a variety of things including loss
describe the significance of micronucleusone of two types of dimorphic nuclei found in ciliate protozoans the single micronucleus contains only one
state the meaning of low tensile strength low tensile strength and chances of consequent cracking and deterioration of load bearing capacity
what do you understand by metanephridiaan excretory-osmoregulatory organ comprising a ciliated funnel nephrostome connected to tubules that lead to
explain metameric in detaila body plan which consists of a series of identical units metameres repeated down longitudinal axis of the animal every
signify the term metacoelthe last of three coelomic spaces found in tripartate body plan characteristic of deuterostome lineage of animals other
what is metachronal wave describeduring the coordination of the ciliary movement bands or groups of cilia are at different stages of their beating
in what way is crop rotation good for soil managementcontinuous cultivation of a single crop over the years on the same site causes accumulation of a
why chemical fertilizers should be supplemented by organic manureexclusive use of chemical fertilizer will eliminate organic matter and thus
explain the law of diminishing return the increase in the yield by a unit increase of the deficient factor is proportional to the decrease from
why is there more exchangeable calcium than potassium on clayhumus colloidcalcium is usually abundant except in acid soils which occur in humid area
leguminous crop grown under phosphate deficiency conditions may suffer from n deficiency as well explainrhizobium bacteria infect the roots of
under what conditions an element is called an essential element an element is called as an essential element if a the plant can not
describe the meaning of continuous cropping continuous cropping or monoculture1 the climate may favour one crop or a soil may be especially
explain in brief about the crop rotation1 deep rooted legumes may be grown periodically over all fields2 there is more continuous vegetative
determine the role of microflora in the soilthe microflora in the soil play an important role in the decomposition of dead plants and animal and
what are the cultural practices continuous cultivation of a single crop monoculture over years at the same site cause s accumulation of a
translate into an equation a number increased by 19 equals 77 let the number be represented by
what is the concept of mesonephricreplaces the pronephros during development and is retained as functional kidney in adult fish and amphibians formed
determine the significance of mesogleathe jellylike layer found between endodermal and ectodermal cell layers of diploblastic organisms it acts as a