2nd PUC Biology Series 4 December 3, 2020December 22, 2020wefru PUC Science 2nd Year Biology Series-4 quiz 0 Created on December 01, 2020 By wefru Biology Series 4 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q.31 River water deposits loamy soil alluvial soil laterite soil sandy soil 2 / 10 Q.32 A fertile agricultural soil appears deep coloured at the surface as compared to soil one metre down. The reason for colour of top soil is more moisture rich in organic matter rich in iron, calcium and magnesium recent formation. 3 / 10 Q.33 Soil particles determine its texture field capacity water holding capacity soil flora. 4 / 10 Q.34 Ultraviolet radiations from sunlight causes a reaction that produces fluorides carbon monoxide sulphur dioxide ozone 5 / 10 Q.35 American water plant that has become a troublesome water weed in India Cyperus rotundus Eichhornia crassipes Typha latifolia Trapa bispinosa. 6 / 10 Q.36 Study of inter-relationships between organisms and their environment is ecology ecosystem phytogeography ethology 7 / 10 Q.37 The sum total of the populations of the same kind of organisms constitute colony genus community species. 8 / 10 Q.38 Soil best suited for plant growth is clay loam sandy gravel 9 / 10 Q.39 Association of animals when both partners are benefitted colony mutualism commensalism ammensalism. 10 / 10 Q.40 Pyramid of numbers deals with number of species in an area individuals in a community individuals in a tropic-level subspecies in a community Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz