A) Fresh water B) Estuarine C) Eschew D) Marine
A) High salinity B) Presence of low level oxygen C) Low light penetration D) Presence of high-level oxygen
A) Benthic zone B) Littoral zone C) Meridian zone D) Supratidal zone
A) High concentration of oxygen content B) Variation in temperature C) Low concentration of oxygen content D) Low salinity
A) Eutrophication B) Etrophication C) Eutriphication D) Eutropication
A) Presence of thick barks B) Presence of broad leaves C) Presence of buttress root. D) Existence of canopies
A) Kalahari desert B) Great Australian desert C) Arabian desert D) Great Britain desert
A) Transportation medium B) Respiratory medium C) Water vapour D) Respiratory surface
A) Small area to aid easy diffusion of gases B) Thin-walled to shorten diffusion distance and make diffusion easier and faster C) Moist surface D) Large surface area to aid easy diffusion of gases
A) Gill fume B) Gill filament C) Gill arch D) Gill raker
A) Ultra filteration B) Glomerulus in the bowman's capsule C) Hormonal secretion D) Selective reabsorption
A) Distal tubule B) Urethra C) Henle's loop D) Bowman's capsule
A) Overpopulation B) Urbanisation C) War D) Poor storage facilities
A) Increased supply of a particular type of food B) Decline in the rate of reproduction C) Emigration D) Competition
A) Water B) Parasites C) Space D) Heat
A) Competition B) Food C) Mortality D) Light
A) Limiting factor B) Dispersal C) Environmental resistance D) Balance in nature
A) Prevention of population explosion B) Promotion of maternal and mother's health C) Prevention of indiscriminate abortion D) Increased risk of STDs
A) Ribosome B) Contractile vacuole C) Endoplasmic reticulum D) Cytoplasm
A) Concentration gradient B) Homeostasis C) Neutralisation D) Osmotic pressure balance |